Personally, I think Squeenix and other MMO companies get a nice kickback from IGE and other similar operations. In this game and Lineage II, it was often blatantly obvious when these people were doing their thing, and it was made known, to the GMs, the names of the people that were doing these things, and yet not a single finger was ever raised against the gil sellers. Even when they did things that "normal" players would have gotten suspended or at least a warning for.