In response to the original post, you are correct that bots upgrade quickly; sometimes banning them is like chopping off the heads of a hydra, but that doesn’t mean we’re going to stop clearing them out and making things more difficult for the people that run the programs.
When it comes to RMT bans, besides the fact that RMT is against the code of conduct, it directly relates to the bot issue – RMT buyers are purchasing bot gold 100% of the time, which means they are directly feeding into and encouraging botters to continue on in the game. Banning them is a significant part of pushing back against this cycle.