Ah well, the keys I won seem to be region limited.
Thrasher, I've sent you a PM. As I said, this never happened to me before I will contact Humble Bundle support and see if I can work this situation out.
Please excuse me!
Henrique
EDIT: I've already contacted them, awaiting for their answer.
I reached the letter L, so everyone who's name starts with the letter M or later (unless it is send by rune or henriquejr), will get their key later. The rest should have theirs.
All keys are sent. Already got feedback on keys that are not working, so contacted the one who donated them.
Something like this happens every year with some keys, so it might be just not resolvable and unfortunately what you won might turn out not to work. That is a real shame. Fortunately the vast majority of the keys work