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Popcuts is a unique online music store. DRM-free songs are sold for 99cents, but every time a song you bought sells, you get a cut of the proceeds (earlier buyers get a bigger cut).

Tipjoy was a simple, social payments engine that allowed merchants to sell digital content and features, charities to raise money for causes, and individuals to give money to one another. Tipjoy was a Winter '08 Y Combinator participant.