Hi, thanks for the feedback. We didn't expect so much attention, that is true and it is really hard to distinguish between true gamer and scammer but as we see that email addresses we are sure that most of them are generated.
BTW. Humble is giving away steam keys yes... But these keys have to be claimed on Steam accounts, so there is no option for resale.
Don't worry, maybe we are new in game development but not as players. We remember times when Humble was giving keys away without this " account claim feature" => It is no more possible and now we know why.
But in its core, still, we are giving something away for free...