I was pretty sure that was the kind of thing you meant, but just wanted to clarify. The API should certainly facilitate doing the kind of setup and management that this would require. But it doesn't currently provide a direct way to do the billing portion of things. So I think it could be a ready solution to open source self-hosted stuff, for instance, but you would have to provide your own billing stuff for commercially licensed things.
Billing is definitely on our todo list as we progress with the beta. Provisioning new accounts is a little trickier as it could potentially open the door to abuse. Which isn't to say we'll never do it or that it isn't possible, just that it is more complicated.
