You are probably right. That said, in this case is it really bad for Blizzard? Blizzard takes 30% off every sale with real money on the auction house. Diablo 2 had a massive real money market but out of the game, so Blizzard decided to take over that market, basically. But if we speak in a purely financial language, more items sold - more money for them. I have no doubt they'll ban botters, though. If you think about it, the RMT AH is brilliant for Blizzard. It's a license to print free money.