Some quick quotes-
http://blog.indiegamestand.com/featured-articles/steam-key-reselling-killing-little-guys/
Was linked on Steam GAF and didn't see a thread for it when I searched.
IndieGameStand has had $30,759.42 in fraudulent credit card charges and transactions.
The problem with these sites like G2A, Fast2Play, Pingwin, etc. is that they have created an ecosystem for hackers, scammers, identity thefts and other internet assholes to steal from indie developers and other small websites.
http://blog.indiegamestand.com/featured-articles/steam-key-reselling-killing-little-guys/
Was linked on Steam GAF and didn't see a thread for it when I searched.