It would be good to be clearer about licenses. It just says "Single Site" right now but it would be good to have a page that clarifies exactly what you mean just in case my idea of what that means differs from yours.

Will exclusive and multi-site license options follow?

Also, on your /sell page there's a heading that says sellers earn between 55 and 75% but in the text of that block it says the non-exclusive share is 35%.

Anyway, as I said below this is awesome and I wish you the best of luck.