How to build and scale winning marketplaces | Casey Winters (Eventbrite, Pinterest, Grubhub)

Successful marketplace scaling hinges on owning demand and establishing proprietary, scalable acquisition loops rather than relying on unsustainable paid marketing. Liquidity—the rate at which supply and demand interact—serves as the critical indicator of product-market fit, often requiring founders to perform non-scalable, manual tasks initially to prove the model. Distinguishing between a SaaS fulfillment tool and a true marketplace is essential, as the latter’s primary value proposition is delivering new demand to suppliers. As marketplaces mature, they must shift from open-access growth to raising supply standards, using data-driven insights to incentivize behaviors that maximize conversion. Strategic category or geographic expansion should only occur once a repeatable, efficient playbook is established, ensuring that the product’s value proposition evolves faster than the quality of new users degrades.