Implement a Digg style voting system. Let the people who download stuff rate things. Stuff that doesn't make the grade, doesn't get cut of the pie.

The crap will scroll off into the void and the cream will rise to the surface, and get rewarded.

mo·nop·o·ly  [muh-nop-uh-lee]
noun, plural mo·nop·o·lies.
1. exclusive control of a commodity or service in a particular market,
or a control that makes possible the manipulation of prices