I think a lot more people involved are guilty than most seem to expect. Games have recorded upwards of 50% of their player base purchases gold in any given month, and some of those games don't even have regular gold spamming advertisements. I very much doubt Square Enix have just banned any account over XXX Gold while they investigate. It's far more likely that they've nailed down the gold sellers (which is not hard to do) and then slapped a temp ban on anyone with direct trade history with them.
Loads of people are buying gold and I would guess that at least half of the people screaming bloody murder, are just trying to play the victim after getting caught out.
