The copy is still pretty focused on the Developer experience building something that uses your thing. But I can't imagine anybody choosing to use this for a product until they know for sure that the end-user experience is painless and frictionless.
I'm actually in the market for something like this. I'm building a game that could benefit from letting people store their savegames in the cloud, but I don't see any particular reason for it to be _my_ cloud. I'd rather not store user/pass information or data at my end, and I'm sure players aren't interested in making an account on my site just to play the game.
If there was something like this that was sufficiently frictionless (on the order of magnitude of going through a "Log in with Google" flow) to set up, I'd be keen to give it a shot. But if there was anything user facing that felt "Open Source", that would kill the idea dead.
Do you have an example of a user setup flow?