retro_gamer: Why people with such a negative rep are attacking me all of a sudden? :/
So, how can I check if the game is still valid?
Antimateria: hmm I remember if it is a gog key you click stuff and you see if it is used.
I'll have to get back on you with that but I remember seeing that, everything has changed a bit though.
I have only STEAM games to give away. So far I know STEAM keys cannot be checked. I didn't click on either redeem code or gift to a friend buttons in the Humble Bundle download pages before, so I'm guessing that the gift urls will give you a valid freshly generated STEAM keys for these games. I think, but I can't say for sure.