spam bots are out of control
I was a computer programmer. Right now they have a moderator banning them manually... I think they need an automated system.
All they would need to do is have a moderator channel where any post containing the letters I F G A N S, or characters which resemble those letters or .com, or gems or 5000 would be filtered and displayed in the moderator's channel. From there, a mod could implement the ban.
It would probably also help if people didn't get chat privilages until level 10. If these accts are truly bots, a pattern should emerge as to how they level to 10. If it is a person or people leveling to 10, you at least made them do some work before they can start spamming.