This isn't something you should be worrying about, as Redundant said, but yes, he was perma-banned for basically paying fake money to buy stuff. I wouldn't be surprised if this was the only game he was buying stuff on as well. I do hope he does get in a lot of trouble for this, so in the future he will know better and not be as stupid as he was this time around.
long story short: he was paying fake money to buy stuff that costs real money, and was stupid enough to do it here.