I see several fatal flaws that are already addressed by other services, like Kickstarter and focus groups: 1. No reward for participation (bad for users) 2. N

I see several fatal flaws that are already addressed by other services, like Kickstarter and focus groups: 1. No reward for participation (bad for users) 2. No promise of a finished product (bad for users) 3. Users have no personal stake in anything they "support" (bad for developers) 4. Highly biased and narrow audience (bad for developers) What people think they want and what they'd actually pay for are often very different things. Contrary to your title, this seems like a great way to encourage developers to build even more crappy apps that no one will ever buy.