Automated systems can always be programmed around. The ONLY solution is active moderation that leads to immediate account termination by offending spammers. If RMT sites are shelling out $20-$30 for accounts that get banned after a single wave of spam, they will be forced to advertise their illicit services in a manner that is less obnoxious to the general player basis. That is how literally every mmo that DOESN'T have RMT spammers handle it.

You want to be a pay to play mmo? Use the $15 a month to hire janitors to clean up the mess as it is being made. Automated moderation services are for free to play games that don't have fixed monthly revenue.