[wmboy]

> I won't be happy if I'm charged upfront, and the project is only half funded.

...so just set it up the same way as Amazon payments. Do an Auth on the card to check it's valid and active, then bill the card when the project is successful.

I guess from their perspective they want to build upon Amazon's payment infrastructure so they don't have to worry about payments and can grow other parts of their business. Which makes sense.