Well, you state that a two tiered system won't work, but you never really give any reasons as to why you feel that way.

Yes, the site makes money because we access it, however it does not make additional money from those abusing the system.  The idea is to weed out the abusers and reward the honest model makers.

Since you don't necessarily want to burden everyone with a reviewing system of some sort, give people the choice.  If you want to be eligible for earning additional revenue thats great, but you'll need to jump through a hoop or two first.

If you don't, then you can upload your stuff here to your hearts content and never have to jump through any at all.  I think that's fair enough, your thoughts?