You are working on a very interesting but complex multi-stakeholder platform model. I love the complexity of multi-stakeholder engagement and business models, but they usually require that founders have a clear competitive advantage on the unleashing supply side of the dynamic, though of course that's just one pattern.
If you'd like my $.02 on this matter, better to talk through this. Feel free to schedule a call https://calendly.com/billybicket/30min