As a fairly new player/subscriber want to say what likely many others know.
The spamming of tells for gil buying is epidemic and is basically making many people turn off all tells, which in effect means a portion of the game/environment is being shut down for many.

If it is true that people have to be a paid subscriber to send a tell, then having a few employees who address the issue could in fact turn a company profit. People seen as being gil sellers in tells could get noted and shut down said account. That then means the gil spammer has to get a another account and pay for it.

Right now it is profitable for the spammers to leach on the environment and almost unlimited spamming. Consider turning it around and making in profitable for the company to have less of these bots/people.