Interesting. I also had been doing pretty well -- playing only the Wiz's approved basic strategy -- and when I saw that it had been removed, my cynical side immediately assumed that because I can't have been the only one doing well, they pulled it to cut losses.
When I asked about it at iNetBet, they initially told me that it must be a problem with my computer. They later said that they hadn't even noticed that it had been pulled (can this be right?), but that RTG had done it because of some sort of "download" problem. I think they were being, at best, evasive. On the other hand, maybe it really was a download problem -- that is, players were downloading a bit too much money.
Oh, well. It shouldn't be surprising that a game offering players a decent opportunity for a return is bound to have a pretty short life-span.