I definitely agree with nhangen. Also, I would add the process of payment. I believe Amazon Payments isn't the best way to earn payments. PayPal would work better for most people, since a lot of people use PayPal, and this would attract more people to Create their own projects.

But the most crucial thing is the approval process, they are hand approved and take days or a week to get them approved or denied, it's very slow, and very demanding since Kickstarter is getting more users attracted.