eBay operates on a capital-light, third-party marketplace business model that distinctively separates it from traditional retailers and e-commerce competitors. Rather than purchasing inventory, managing sprawling fulfillment centers, or handling complex logistics operations, the company simply provides the robust digital infrastructure necessary to connect independent sellers with millions of active global buyers. The primary source of revenue is generated through seller fees; the company charges sellers a fee to list items on the platform and collects a percentage 'final value fee' on the total amount of each successful sale, including shipping and handling costs. This transaction-based revenue model ensures that the company profits directly from the overall volume of commerce flowing through its ecosystem. In addition to basic transaction fees, the company offers premium listing upgrades and robust advertising solutions, allowing sellers to pay for enhanced visibility and sponsored placement within search results. This advertising revenue represents a rapidly growing and high-margin segment of the business. the company offers tailored subscription plans for professional merchants, providing access to advanced analytics, inventory management tools, and reduced final value fees. By maintaining an open, asset-light structure, the company enjoys strong profit margins and robust free cash flow generation, mitigating the severe capital risks associated with holding unsold inventory while continuously adapting its marketplace to support new seller tools and buyer protections.