Rikifive

I've done that once (maybe even twice). 

@Lord Valtasar Sadly, nope.  Humble is giving Steam keys for you to redeem afterwards and even though I have linked my Steam account there, Humble doesn't inform me, that I already have the game in my library on Steam. I claimed the game (it is instant - with just one click needed, without any prompt), got the key and upon redeeming Steam informed me, that I already own the game.  So I guess now I have one more key to giveaway. 

It kinda sux, that Humble doesn't put quick links to Steam store pages. It gives steam keys, but you have to look that all up yourself. Humble store pages aren't really informative in general. I guess I'll have few things to say when they'll be collecting feedback next time. 

@Dark Horse Heh, with how many random games humble floods the steam library, it's hard to keep track of these. 

hmm.. so that key is tradeable?maybe you can trade that it with someone for something you don't have