Costco Wholesale Corporation vs Shopify Inc.: Strategic Comparison

This in-depth comparison examines Costco Wholesale Corporation and Shopify Inc. across revenue, market value, business model, competitive positioning, and long-term growth strategy. Whether you are researching Costco Wholesale Corporation on its own, evaluating Shopify Inc., or weighing the two companies side by side, the breakdown below highlights where each company leads and where the gap between Costco Wholesale Corporation and Shopify Inc. is widest.

On the headline numbers, Costco Wholesale Corporation reports annual revenue of $275.2B against $11.6B for Shopify Inc., while their respective market capitalizations stand at $396.7B and $115.0B. Costco Wholesale Corporation is headquartered in United States and Shopify Inc. operates from Canada, and those different home markets shape how each company competes.

Costco Wholesale Corporation: Costco's retail markup cap is approximately 15 percent on national brands and 14 percent on Kirkland Signature products. A conventional retailer marks up 25 to 50 percent. Walmart marks up 24 percent on average. Costco's margin discipline is so extreme that the company structurally cannot earn significant profit from selling products — which is exactly the point. The profit is in the membership fee, and the membership is so valuable that 93% of North American members renew it every year. Founded in 1983 by James Sinegal and Jeffrey Brotman in Issaquah, Washington — after the merger with Price Club in 1993 — Costco operates 914 warehouses globally and generated $275.2 billion in FY2025 revenue under CEO Ron Vachris, who took over in 2024. The membership fee business generated almost all of the company's operating profit. Everything else — the pallets of paper towels, the rotisserie chickens, the Kirkland Cashmere sweaters — serves primarily to justify the annual membership renewal. The Kirkland Signature private label is the financial multiplier that most analysts underweight. Kirkland items typically carry higher gross margins than the national brands they sit next to, while priced lower. The formula works because Kirkland's volume is large enough to negotiate manufacturing contracts at scale that national brand companies can't match at retail. When Costco sells Kirkland olive oil, it earns more per unit than it earns selling Bertolli at a lower price — and the customer gets a better deal. Net income of $8.1 billion on $275.2 billion in revenue tells you almost nothing about Costco's actual business quality. The $396.7 billion market capitalization — roughly 49x trailing earnings — tells you what the market believes about the durability of member loyalty, the Kirkland brand, and the pricing discipline that has made Costco the retailer that customers actively root for.

Shopify Inc.: On Black Friday 2024, Shopify merchants processed a record $11.5 billion in a single day. The company that enabled those transactions earned nothing from selling products — it earned payment processing fees, subscription fees, and capital interest from 1.75 million merchants in 175 countries who sell everything from artisan candles to enterprise consumer goods. Shopify processes $236 billion in annual Gross Merchandise Volume and holds the second position in US e-commerce by volume behind Amazon — yet its financial model is structurally aligned with merchant success in a way that Amazon's marketplace model is not. Tobias Lütke, Daniel Weinand, and Scott Lake built the Shopify platform in 2006 after Lütke had written e-commerce software in 2004 to sell snowboards online — the software turned out to be worth more than the snowboards. That origin story, where the infrastructure built to solve one founder's problem became the product sold to millions of others, is not unique in technology. What is unusual is the discipline with which Shopify maintained that merchant-first orientation through two decades of competitive pressure from Amazon. Revenue grew from $4.612 billion in 2021 to $5.6 billion in 2022 to $7.06 billion in 2023 to $8.88 billion in 2024, with net income of $1.3 billion on $8.88 billion — a 14.6 percent margin that reflects the maturation of the Merchant Solutions business, where payment processing fees scale directly with $236 billion in annual GMV. The $115 billion market capitalization and 8,300 employees produce revenue per employee of approximately $1.07 million — a ratio that reflects the software leverage of a platform business rather than the labor-intensive economics of traditional retail infrastructure. The 2023 logistics reversal — selling $2.1 billion in Deliverr assets to Flexport within 12 months of completing the acquisition — was one of the fastest major strategy reversals in technology company history. Lütke acknowledged publicly that building physical logistics was a distraction from the core commerce platform. The reversal cost $2.1 billion in acquisition price plus integration disruption, but the discipline to acknowledge and correct an expensive mistake in twelve months is uncommon in large technology companies where sunk cost reasoning typically extends failed bets for years.

Costco Wholesale Corporation and Shopify Inc. pursue distinct approaches to generating revenue, and understanding how each company operates is the foundation of any fair comparison between Costco Wholesale Corporation and Shopify Inc..

Costco Wholesale Corporation business model: A typical grocery chain or department store earns profit by marking up products — buy low, sell higher, pocket the spread. That fee income flows almost entirely to the bottom line because collecting it costs nearly nothing — no inventory risk, no spoilage, no freight. Everything else the company does — moving pallets, negotiating with Procter & Gamble, running gas stations — exists to make that $65 or $130 annual card feel like a bargain. Gold Star costs $65 per year and gives household access to warehouses and online pricing. The result is lower unit costs, which get passed to members as lower shelf prices, which justifies the membership fee, which funds the next cycle. Costco controls sourcing, quality standards, and pricing through its Costco Wholesale Industries subsidiary, which means it doesn't just slap a label on someone else's product. Ancillary services — pharmacy, optical, hearing aids, travel, auto buying, the Costco Anywhere Visa by Citi — add layers of value that make the annual fee feel increasingly justified without requiring significant capital investment per service. The metric that matters most for Costco isn't revenue growth. Revenue model: Costco sells goods at low margins and earns a large share of profit from annual membership fees, supported by high-volume warehouse operations. But it explains why Costco commands a $65 membership fee against Sam's Club's $50, why renewal rates sit above 93%, and why members talk about the store the way people talk about restaurants they love — with genuine enthusiasm rather than transactional loyalty. Costco members feel like they belong to something. Sam's Club members feel like they're saving money. It either passes the cost through (which makes members feel less special) or eats it (which compresses already-thin margins). The 2024 fee increase — the first in seven years — tested whether the relationship could absorb a price hike. The problem is, you'd need suppliers willing to give you rock-bottom pricing on day one, which they won't do without proof of volume. Once you've paid $65 or $130, you feel compelled to shop there to "get your money's worth." That's not rational — the fee is sunk — but it's powerful. Carrying 3,800 SKUs instead of 30,000 means each item sells in enormous quantities. That gives Costco pricing use that even Walmart struggles to match on a per-item basis. Costco pays above-market wages — starting around $18-19/hour with benefits — and gets turnover rates far below retail averages. Executive membership upgrades are pure revenue-per-member growth. Costco didn't flinch — it kept opening warehouses, kept markups at 14%, and let the internet kill everyone else's margins while its membership fees quietly compounded. Amazon, Walmart, and Sam's Club are competing to make leaving your house feel unnecessary. Sol Price had a rule: never let the customer feel stupid for shopping with you. Asking households to pay $25 per year (the original fee) just to walk through the door was bizarre in 1983. The fee paid for itself in a single shopping trip, and after that, every subsequent visit felt free. Both companies were growing, but the overlap was creating pricing pressure and real estate conflicts. By then, the culture had calcified into something remarkably durable: cap markups at 14-15%, carry fewer than 4,000 items, pay employees well, open warehouses slowly and carefully, and never let the customer feel like they're being played.

Shopify Inc. business model: Its financial interest is entirely aligned with merchant success: Shopify earns payment processing fees that scale directly with merchant GMV, capital fees on merchant loans that scale with merchant borrowing, and subscription fees that increase as merchants move to higher tiers. This composition is strategically significant: a company whose revenue is 75% transaction-linked grows in direct proportion to how well its merchants grow, creating a flywheel of aligned incentives that pure subscription software companies do not enjoy. The revenue composition means Shopify's earnings scale directly with merchant success: as merchants grow their businesses, Shopify Payments fees increase, Shopify Capital advances grow, and subscription upgrades follow. **Subscription Solutions** generates approximately 25% of revenue through monthly and annual fees from merchants across four principal tiers. Shopify Plus, starting at $2,300/month (with pricing that scales with merchant GMV for the largest merchants, reaching $100,000+ annually for some enterprise accounts), serves high-volume brands and provides fully customizable checkout, dedicated account management, wholesale channels, and advanced API access. Subscription revenue is highly predictable and recurring — the key metric is Monthly Recurring Revenue (MRR) and the churn rate of the merchant base — but grows more slowly than the transaction-based business because subscription prices are set annually rather than scaling with each individual merchant's sales growth. Shopify Payments earns a payment processing fee — typically ranging from 0.5% to 2.9% plus a fixed amount per transaction, varying by merchant subscription plan — on every sale processed through the platform. The Basic plan rate (2.9% + $0.30) steps down to 2.4% + $0.25 on the Shopify plan and 2.15% + $0.25 on the Advanced plan, creating an incentive to upgrade subscriptions for high-volume merchants. For merchants not using Shopify Payments, an additional transaction fee of 0.5 – 2% applies, creating a strong financial incentive to switch to the integrated payment product. In markets where Shopify Payments is not available, this transaction fee captures a margin on third-party payment volume. Shopify Capital has extended hundreds of millions of dollars to merchants annually and generates fees on each advance. Developers pay Shopify a revenue share (approximately 15 – 20% on recurring subscription app revenue) for access to the merchant base. The strategic flywheel that makes this model increasingly valuable: as merchants grow on the platform, their GMV increases, increasing payment processing fees. Larger merchants upgrade to higher subscription tiers. A merchant who starts on Basic at $29/month and grows to $5 million in annual GMV generates approximately $100,000 per year in Shopify Payments fees — making the subscription fee economically trivial compared to the payment revenue. The subscription is effectively a customer acquisition cost for the Merchant Solutions business. Shopify sells to entrepreneurs whose interests are unambiguous — they want their stores to make more money — and earns revenue that scales directly with how well those entrepreneurs succeed. Klaviyo (email marketing), Yotpo (reviews), Gorgias (customer service), Recharge (subscriptions), and hundreds of other companies have built businesses specifically serving Shopify merchants — they are not merely compatible with Shopify but optimized for it, with Shopify-specific workflows, data schemas, and support documentation. Large brands that build their digital commerce stack on Plus — with customized checkout flows, wholesale channels configured for their distributor network, international storefronts in multiple currencies, loyalty programs integrated at the checkout level, and custom ERP connections — face migration costs that typically exceed a million dollars in implementation fees alone, plus months of project management and operational disruption risk. Each new country where Shopify Payments launches transforms existing merchants from subscription-only revenue to subscription-plus-payments revenue — a step change in revenue per merchant. Each expansion requires local regulatory approval, banking relationships, and payment method integrations, but the economic return is clear: payment processing on GMV that was previously generating only transaction fees or subscription revenue. Each new country where Shopify Payments launches unlocks payment processing revenue on GMV that was previously generating only subscription fees or (for merchants on third-party gateways) additional transaction fees rather than the full processing economics. If AI tools can meaningfully reduce the time and cost of merchant operations — generating product descriptions, automating customer service, optimizing advertising campaigns — they could both improve merchant success rates (increasing GMV and therefore payment fees) and create new revenue opportunities as premium AI features are offered on higher-tier plans. The $29/month pricing was a deliberate statement: Lütke wanted to make professional e-commerce accessible to the people who had been priced out of existing solutions.

The durability of a company's moat often decides long-term winners. Here is how the competitive advantages of Costco Wholesale Corporation stack up against those of Shopify Inc..

Costco Wholesale Corporation competitive advantage: Competitive position: Costco's advantage is its membership model, high inventory turnover, low markups, private-label strength, and unusually strong customer loyalty. That's a strange competitive advantage to have. Walmart's supply chain means Sam's Club can price aggressively in categories where scale matters. BJ's Wholesale occupies the East Coast niche but hasn't scaled beyond 250 clubs in decades. Not any single advantage, but the fact that assembling all of them simultaneously is nearly impossible for a new entrant. It wasn't built on technology or patents or network effects.

Shopify Inc. competitive advantage: The majority — approximately 75% — comes from Merchant Solutions: the payments processing, merchant financing, shipping tools, and app ecosystem surrounding the core software platform. This allows Shopify to extend credit to merchants who would be declined by banks on the basis of insufficient credit history or collateral, while managing risk better than a bank could because of the sales data advantage. **The App Store and Partner Ecosystem** encompasses the 8,000+ third-party applications built on Shopify's API and distributed through its App Store. Each additional app a merchant installs increases their operational dependence on the Shopify ecosystem, raising switching costs progressively. Shop Pay is a one-click checkout button that stores payment and shipping information for repeat purchases across any Shopify-powered store — analogous to Amazon's one-click checkout but network-based across the entire Shopify merchant ecosystem. More app integrations are added as complexity grows, increasing App Store revenue and switching costs. The two ecosystems have coexisted and grown simultaneously rather than one displacing the other. Shopify's Shop Pay is the direct competitive response — a one-click checkout with similarly strong conversion metrics but without Amazon's consumer lock-in. Salesforce Commerce Cloud and SAP Hybris defend large enterprise accounts but face increasing defection to Shopify Plus as brands realize the implementation cost and time-to-market advantages of Shopify's managed infrastructure. The pandemic acceleration phase (2020 – 2021) was exceptional in both scale and duration. WooCommerce has a large installed base — particularly among merchants who already run WordPress sites — but requires more technical management and lacks the integrated payment, capital, and logistics services of Shopify's Merchant Solutions ecosystem. Shopify's most durable competitive moat is ecosystem lock-in that deepens with each passing year of merchant operation. As merchants grow, the lock-in compounds. By year three, a growing merchant typically has integrated email marketing, a loyalty program, a reviews platform, inventory management, accounting software, and potentially several other tools — all through Shopify's API ecosystem. The switching cost has effectively become prohibitive. Shopify Plus deepens this moat at the enterprise level specifically. Payment processing scale creates a second competitive advantage through pricing leverage and data accumulation. Founder control through Lütke's dual-class shares (approximately 36% of votes from approximately 8% of shares) provides a structural competitive advantage in corporate strategy: the company can make long-term platform investments — the App Store ecosystem, the Shop app, international Shopify Payments expansion — without the quarterly earnings pressure that managers at other companies face. This requires continuous product investment in ease-of-use, reliability, and feature depth, plus the App Store ecosystem that provides third-party functionality. The data advantage that makes Shopify Capital's risk models superior to bank underwriting applies equally to other financial products: Shopify knows more about its merchants' businesses than any external financial institution, which is a durable advantage in selling financial services to those merchants. Enterprise migrations are slow (12 – 18 month implementation projects) and expensive to win (dedicated sales teams, reference customers, partnership ecosystems), but each won enterprise account contributes multiples more revenue per year than an SMB account.

Future prospects matter as much as current results. The growth strategies below explain how Costco Wholesale Corporation and Shopify Inc. each plan to expand from here.

Costco Wholesale Corporation growth strategy: Its strategy centers on Costco is expanding warehouses globally, growing e-commerce carefully, strengthening Kirkland Signature, and keeping prices low to defend renewal rates. The problem is, Strategic direction: Costco is expanding warehouses globally, growing e-commerce carefully, strengthening Kirkland Signature, and keeping prices low to defend renewal rates. Costco's growth strategy is anchored by a single priority with a handful of supporting moves. Most analysts miss that this restraint is the strategy, not a failure to execute.

Shopify Inc. growth strategy: Tobias Lütke spent two weeks building his own online store using Ruby on Rails — the web framework created by David Heinemeier Hansson, whose open-source work Lütke had been following in the developer community — sold a modest inventory of snowboards through a store he called Snowdevil, and then recognized something more valuable than the snowboard business: the software itself was better than anything commercially available. He didn't launch a snowboard company. He then made a second critical decision: keep the platform simple enough that a non-technical person could build a professional store in under an hour. Where enterprise e-commerce platforms competed on feature depth and customizability — selling to IT departments and technical project managers — Shopify competed on time-to-launch and ease of operation, selling directly to entrepreneurs. Amazon is a retailer that also lets third parties sell on its platform — and it competes with those third parties by launching private-label products in successful categories, by favoring its own listings in search results, and by charging increasing fees as merchants grow more dependent. When merchants succeed, Shopify's revenue grows; when merchants fail, Shopify loses a customer. The Advanced plan ($299/month) targets growing businesses with advanced report building and third-party calculated shipping rates. The economic model is elegant: Shopify earns more per dollar of GMV on its own payment product than on third-party payment volume, and the gap widens the more Shopify succeeds in expanding Shopify Payments internationally. The ecosystem also includes the Shopify Partner program, through which thousands of agencies and developers build custom Shopify storefronts for merchants — a channel that simultaneously provides Shopify with free sales distribution (agencies recommend the platform to their clients) and contributes to the quality and variety of merchant implementations. Growing merchants need more capital, driving Shopify Capital use. The pandemic period (2020 – 2021) was significant: lockdowns forced businesses that had been debating an online presence for years to build one immediately, and Shopify's combination of ease-of-launch, affordable pricing, and growing Merchant Solutions ecosystem made it the default choice for millions of new online merchants globally. The D2C (direct-to-consumer) trend simultaneously brought high-quality brands that had previously sold primarily through wholesale channels onto Shopify Plus — Gymshark's trajectory from a Shopify-hosted startup to a billion-dollar brand became a reference case repeated in investor presentations and entrepreneurial media. BigCommerce, which attempted to position itself as the 'enterprise-grade alternative to Shopify,' has grown more slowly and trades at a fraction of Shopify's revenue multiple. Returning to pure software-and-payments eliminated the confusion, improved margins, and allowed management focus to return to the product investments that generated competitive advantage: Shopify Magic (AI tools), Checkout Extensibility, Shopify Markets Pro, and international Shopify Payments expansion. Shopify's financial history divides cleanly into three phases, each with distinct economics and investor sentiment. The pre-pandemic growth phase (2015 – 2019) established the platform's unit economics and revenue model. Net income was consistently negative during this period, as the company invested heavily in platform development, international expansion, and the growing Merchant Solutions infrastructure. However, the growth multiple compression from high investment was consciously accepted: management and investors agreed that building merchant ecosystem depth was worth near-term losses. Revenue growth slowed to 21% in 2022 as merchant GMV growth decelerated toward pre-pandemic rates. Free cash flow exceeded $1.5 billion in 2024, firmly establishing Shopify as a profitable high-growth company rather than a high-growth company perpetually investing toward future profitability. For Shopify, the risk is that Buy with Prime makes Amazon the effective payment processor on Shopify-hosted stores — inserting Amazon between Shopify and the merchant transaction, displacing Shopify Payments as the checkout mechanism, and potentially building a consumer relationship on top of Shopify's merchant relationship that Amazon can use further. The social commerce challenge is structural and growing. In China, live-stream commerce through Douyin (TikTok's Chinese counterpart) has grown explosively and now represents a significant share of e-commerce volume. In Western markets, TikTok Shop is still developing, but its growth rate and the engagement dynamics of short-form video suggest it could become a meaningful commerce surface by the late 2020s. Competition in the SMB segment comes from Wix and Squarespace for very small merchants who prioritize website builder simplicity over commerce depth, and WooCommerce (the open-source WordPress e-commerce plugin) for merchants who prefer self-hosted control over hosted simplicity. At the enterprise end, Salesforce Commerce Cloud and SAP Hybris defend incumbent positions with large brands whose IT departments have invested years in these platforms. The enterprise migration market — brands leaving these legacy platforms for Shopify Plus — is one of Shopify's highest-priority growth vectors, and each major brand that migrates (Heinz, Mattel, Reebok, Staples) becomes a reference that accelerates further migrations. The Shopify App Store hosts 8,000+ third-party integrations built specifically for Shopify's API, because 1.75 million merchants represents an addressable market large enough to justify significant development investment from hundreds of software companies. A merchant who wants to migrate from Shopify to a competing platform faces not just the cost of rebuilding the storefront but the cost of replacing every integrated app with a competing platform's equivalent — and some Shopify-specific apps have no direct equivalent on alternative platforms. Shopify's growth strategy is built on a concentric ring model: the core platform generates merchant adoption, which funds Merchant Solutions expansion, which deepens merchant relationships, which creates switching costs that retain merchants and enables monetization of additional services. The innermost ring is the core platform — maintaining Shopify as the default choice for merchants launching an online business. Investment in the core platform is essentially defensive: it prevents merchant churn to competitors and maintains Shopify's position as the standard for new merchant launches. Shopify's medium-term growth thesis rests on four vectors that management has publicly discussed and that analyst consensus broadly agrees on. The enterprise migration market — large brands and retailers on Salesforce Commerce Cloud, SAP Hybris, and Magento Enterprise — represents the highest unit-value growth opportunity. As Shopify Plus's track record with major brands grows and the competitive cost advantage of Shopify's managed infrastructure versus legacy platforms becomes more demonstrable, the enterprise migration pipeline should expand. AI integration through Shopify Magic represents the newest growth vector. Tobias Lütke did not set out to build a platform. The enterprise platforms — ATG Commerce, IBM WebSphere, BroadVision — were designed for large IT departments, cost hundreds of thousands of dollars to implement, and required months of professional services work to launch. The common thread was a market that had been built by and for technical and corporate buyers, leaving entrepreneurial merchants with nothing between 'pay enterprise prices' and 'build it yourself.' Lütke chose to build it himself. Over approximately two weeks in 2004, he used Ruby on Rails — the web development framework that David Heinemeier Hansson had extracted from Basecamp and released as open source — to build the Snowdevil online store from scratch. Rails made web application development dramatically faster and more elegant than alternatives available at the time; it was exactly the right tool for building an online store quickly. There was no office, no sales team, and no marketing budget to speak of — the product spread through word-of-mouth in early entrepreneur communities online, through startup blogs and forums where people shared tools they were using to build businesses. Growth through 2006 – 2009 was organic and bootstrapped. Lütke's engineering background kept the team small; every dollar of revenue was reinvested in product improvement rather than sales infrastructure. Shopify hosted its infrastructure on third-party servers (initially a single server in a data center) rather than building its own, keeping capital requirements low. The team operated with a philosophy that Lütke articulated later: build the best possible version of the product for merchants, and trust that good products find their market.

A closer look at the financial trajectory of Costco Wholesale Corporation and Shopify Inc. rounds out the comparison.

Costco Wholesale Corporation: Costco's revenue has grown at a consistent pace: $226.9 billion in FY2022, $242.3 billion in FY2023, $254.5 billion in FY2024, $275.2 billion in FY2025. That's roughly 7% annualized growth at a company with $275 billion in revenue — an achievement that requires opening new warehouses, expanding internationally, and growing same-warehouse sales in an existing footprint of 914 locations. Net income of $8.1 billion on $275.2 billion in revenue is a 2.9% net margin that understates the business quality dramatically. The membership fee revenue flows almost entirely to the bottom line because collecting it costs nearly nothing — no inventory, no spoilage, no freight. The merchandise business is intentionally run near breakeven to maximize the value proposition that justifies the membership fee. The $396.7 billion market capitalization — roughly 49x trailing earnings — is the clearest signal of how the market values membership-based retail. Investors are not pricing Costco as a low-margin merchandise business. They're pricing it as a recurring revenue platform with exceptional customer retention, growing global footprint, and a private label that commands premium margins on high-volume categories. Warehouse-level economics support the premium. A new Costco warehouse typically generates first-year revenue around $130 million and reaches $250 million-plus within three years, with occupancy costs fixed through long-term leases. The capital required to open a warehouse is large but the payback period is short relative to the lifetime revenue that follows. International expansion — Canada, Japan, Korea, Australia, and increasingly China — applies the same economics to markets where the membership model hasn't yet saturated.

Shopify Inc.: Revenue of $8.88 billion in 2024 — from $7.06 billion in 2023 — grew 25.7 percent, sustaining double-digit growth on a base that had already crossed $5 billion. Net income of $1.3 billion represents the first sustained profitability at scale after years of investing aggressively in platform infrastructure, logistics experiments, and international expansion. The 14.6 percent net margin is below the platform software industry's best performers but appropriate for a company still investing in growth. The composition of $8.88 billion in revenue explains the business model's durability. Merchant Solutions — payment processing fees, capital fees on merchant loans, shipping integrations — constitutes the larger share of revenue and grows with GMV. A merchant processing $5 million annually generates approximately $100,000 in Shopify Payments fees; the $29/month subscription fee is economically trivial relative to that relationship. The subscription revenue provides a stable floor while Merchant Solutions scales with the overall volume of commerce flowing through the platform. The $236 billion in annual GMV processed across 1.75 million merchants in 175 countries represents the economic activity that Shopify's infrastructure enables. On Black Friday 2024, $11.5 billion in a single day demonstrates both the peak capacity of the platform and the strategic value of the Shopify Payments infrastructure — every dollar processed through Shopify Payments generates a processing fee, and that fee applies to the most commercially concentrated day in the retail calendar. The $115 billion market capitalization against $8.88 billion in revenue — a 12.9x price-to-sales multiple — reflects investor confidence that GMV continues growing as the merchant base expands in international markets and as existing merchants grow their own businesses on the platform. The alignment between Shopify's revenue and merchant success — the company earns more when merchants earn more — is the structural reason that multiple is defensible relative to platforms whose revenue is not directly tied to their users' economic outcomes.