So I bought Mafia 3 in preorder from Humble quite a while back (just the regular edition), activated my key and installed the game.

Was just in my HB account and decided to check if I had any leftover keys, clicked “Hide redeemed keys” and noticed one saying “Mafia 3 Digital deluxe” which did NOT have a gift option.

Figured I’d give it a try and, bizarrely, I now have an upgrade and the season pass. Is this some kind of promo or an error from HB? Couldn’t find any details online anywhere!

Edit: screenshot here imgur.com/a/3Bwbw