They often leave the bots up in order to track the money. If a bot has been farming for months on end they are aware of it. That bot trades its goods to get money. Then he trades that money to some characters who hoard it. Then that player tends to distribute the money to people who purchase the gil. If they follow the money they hit the big characters who are hoarding all the cash. This results in a handful of bans removing billions of gil from the economy. Meanwhile, the same bot keeps on botting as SE uses them as their little spy. Getting his RMT stockpile baned left and right.

Everyone thinks SE doesn't care because the bot remains. Seems no one here understands how police informants work in real life. No one cares about the small fry. Use them to get to the big daddy.