Ok, well here's my suggestion which is bound to upset some people but since it's already been brought up. If you wish to continue sharing revenue with the uploaders. I suggest a new policy be put into effect where revenue sharing is only given to those uploaders whom the admin deem to be quality providers. It will stop those who aren't getting paid from uploading junk and it will encourage those providing quality stuff to keep doing so.
It will require active participation by the site admins in going through the uploaded content and deciding whether or not someone is producing enough quality items to be bumped up to paid provider status. And just because someone achieves that status shouldn't mean they can't loose it if they start abusing the privilege.
That's my 2 Cents.
It is a miracle that curiosity survives formal education. - Albert Einstein