Let me know If I can help you. I am working with Yo!Kart online marketplace platform where we help global business owners to launch their own eBay, Etsy, Amazon, or other such marketplaces. I can help you to guide on these topics:

Future of online marketplaces
Different Business models
What are popular revenue channels in an online marketplace
What are the must-have features and functionalities?
How to start with pro active and pre active marketing

Feel free to ping me.

Thank You