Federated data management approaches like data mesh promise to reduce complexity by organizing data into domain-owned, reusable products. But managing data as a product alone isn't enough. In many organizations, true reuse and cross-domain collaboration remain limited, while redundant data products continue to grow driving up costs without delivering efficiency. To make federated data strategies work, organizations also need a platform where supply and demand can meet, and where valuable products can be easily discovered, understood, accessed, and combined. They need a data product marketplace. In this talk, using real-world examples, we will explore how a data product marketplace: Drives reuse and composability of data products, reducing integration costs and helping stabilize maintenance over time. Aligns data supply with real business demand, highlighting high-value products and preventing the unchecked growth of low-impact ones. Engages the full ecosystem, from producers to consumers, in shaping governance policies and a shared language that support collaboration and trust. A well-designed data product marketplace is not just a nice to have. It is the necessary link that makes federated data management strategies both sustainable and effective.