Keep in mind, too, that if these cheaters are associated with RMT, SE may not ban them immediately because they're small fish and easily replaced. They want to figure out the whole network, where the money is being stored, etc, etc, and rip the whole thing out by the roots. If that means letting miner bots mine for a few weeks, then so be it.

In general, the most blatant uses of move hax and such are used by RMT and not players, because RMT have a lot less of a personal vested interest in their characters. They could care less if their three-day-old miner-bot gets banned. A real player, who put care and thought into building their character? They will be much more broken up about it if their character is banned - and so if they cheat, they're going to be a lot more subtle about it.