Well I beg to differ...

You know what it says, on the page where you create your giveaway?
"
Giveaway a valid Steam serial key you own. Remember that trading a serial key you own is based on the assumption that the serial key has not been activated before and that it is effectively associated to the title and app-id specified. Should your NON-guaranteed trade be accepted, the user who created the offer will have the possibility to leave a positive or negative feedback regarding the outcome of this trade."
Yes, it is really hard to understand. That is why I highlighted the sentence.
Edit: IndieGala does not explicitly say that you cannot give your grandma away. Oh, wait, there is an idea ...
