Platforms require developers to invest in them before seeing their benefits. In other words, developers need to invest their time and money to create apps or extensions for the platforms' users before they can earn. This makes platforms very sensitive to friction and limits their monetization options to just 3 out of the 6 possible models used by other network types.
https://medium.com/breadcrumb/platform-monetization-dealing-with-high-adoption-barriers-57eed4e15836
