I can understand why these guys don't get banned because anything that happens outside of the game is basically outside of the jurisdiction of the GMs/STF, which is unfortunate because they generally offer links directly to a page that lists the prices they're trying to sell content at.
What I'd love to know is why like 99% of the bots in the game seem to have ban immunity and never get punished no matter how obvious they are or how often you report them.
It's well-documented at this point that the only type of ToS violations that tend to be addressed in a timely manner (If at all) are ones that are recorded in the chat log or some other readily accessible resource, such as verbal harassment. Anything that requires a more thorough "investigation" such as botting or hacking is seldom ever acted against.
The tiny amount of bans for botting being issued on a weekly basis is really unacceptable when I've seen as many bots on my server alone as the total amount of players being banned across all of the servers together. I'd reckon there's probably several hundred of them across all of the servers and they're generally using the same programs and thus exhibiting identical behavior, so I don't see why they'd have so much trouble dealing with them.
Yes, they're doing something, but they aren't doing enough. It's also worth noting that most of the RMT-related bans are done against totally automated bots that are created faster then the GMs can actually ban them, so it ultimately accomplishes almost nothing. They need to find a more permanent solution to the matter if they truly want to curb the RMT, but even if they get rid of the expendable bots, it's well-known that "legit" players sell gil, often through heavy reliance on level 70 DoL/H bots, so those need to go as well, particularly because they tend to destabilize the economy through market flooding and rampant undercutting.