Why so many bot on my server.

[Alberel]

Because SE don't do anything about it. Countless bots on my server everyday, obvious as anything yet still exist.

The bots themselves actually aren't the problem. SE does ban them but they do so in waves as it allows them to track the actual accounts used to store and trade the gil they make. Banning the bot accounts alone ultimately does nothing to solve the problem as they just create new accounts, even if it does remove them from the world temporarily.