Platform firms — businesses that enable transactions between two parties — constantly struggle to prevent those partners from taking their deals off-platform. The technical term for this is “disintermediation,” and examples of it include readers buying online rather than from bookstores, Upwork and ZBJ (China’s Zhu Bajie) programmers contracting directly with clients, and Airbnb struggling not only with guests contracting directly with hosts, but also with some of its biggest professional hosts reportedly competing against it on new platforms. Disintermediation — and the failure to understand and address it — killed once thriving businesses like Borders books, Blockbuster movies, and Tower records. It’s easy to understand why platform companies worry so much about being cut out of the loop.