I'm a bit inexperienced with redeeming the keys.
I was wondering this: I can already generate STEAM or GOG keys on my backer portal. The question is, what if I use those keys then on Steam and GOG?
I mean, the game has not been released yet. How do Steam and GOG handle that if you try to redeem a code for a game that has not been released yet?
At least with Steam, it'll just download the game when it's released if you use the key now. (In fact, it will generally pre-load it so you can play it the moment unlocks.)