I made a post in the GOG forum to give away my extra kickstarter alpha/beta key. I figured I'd mention it here, in case anyone was following the forum but didn't back D:OS (or get the Early Access version).
Also, if anyone backed the kickstarter but are not planning on using their key(s), they are welcome to add them, if they are so inclined.
I the end I just followed Raze's example, doing a random draw, so no funny quotes here. But I'd like to encourage anyone who has a spare key left, you're doing yourself, the winner and Larian a favour by giving it away! And as Raze confirmed: you're not losing codes for the final game, those will still be yours.