You'd have to mitigate against the Sybil attack. Crowd funding is one way (ironic since I think you meant crowdsourced?) but as we know from SEO optimisation, a

You'd have to mitigate against the Sybil attack. Crowd funding is one way (ironic since I think you meant crowdsourced?) but as we know from SEO optimisation, all that does is force you to pay to get your spam/malware promoted.