Similar to what Google does for their Google Apps Marketplace - https://stackoverflow.com/questions/tagged/google-apps-marketplace
This is all covered in our help center article "Can I support my product on this site":
site namecan help support your product but it can't be the only support. There are issues that only you can address, and if you send your users to
site namefor them they'll just get frustrated.
(I have used
site name as this will be different on each site).
If you go to
/help/product-support on any of the sites, you will see exactly what that site policies are (I have linked to the main template that can be overridden site by site basis).