7:36 PM
Alright, I've finally got my Humble Monthly subscription working. @Mego the reason those keys stopped working was that I got the subscription as a gift from friends, who accidentally managed to buy the subscription for themselves, so they just passed on the keys while trying to figure out how to change the subscription to be in my name. What Humble ended up doing was to cancel and refund the subscription entirely so I can just buy the subscription myself.
So unfortunately, I ended up losing all keys from the first two months (including DS3 :(), but now I've got a working subscription for the next year.
And now gifting away individual keys should work without issues. So if anyone wants my spare key for Deus Ex: Mankind Divided, let me know...
(Mego gets priority if he wants it, because the other keys I gave him got invalidated :P)
