Yeah that could work for certain projects, but for me there will be only one build of my game.  Since my game is online only, players will get their reward/rewards attached to their account which i guess they will have to redeem by submitting their purchase key from this site, or from patreon.   But would be nice if i could stick to one system then i'd only have to deal with one API etc.  Still trying to figure if what i want to do is possible.

Thanks for the info, it's a shame to hear that the API is not that great (I haven't even looked into it yet) but good to hear they are working on it.  Let's hope the improvements come sooner rather than later.