To promote their new game Blackguards the developer Daedalic Entertainment is giving away 40,000 GOG keys of a previous game of theirs, The Dark Eye: Chains of Satinav. The instructions are listed in the topic, but basically you PM the user they have a link to and a bot will PM you back with the GOG redemption link for the game.
I just found out about this, but apparently it's only going to be up for another few hours or so, or until they run out of keys. Just thought I'd throw this up here in case anyone was interested in this game. --- Diners, Drive-Ins, & Dives "One embarrassing clown's quest for the ultimate case of diarrhea."