Every few months Square/Enix lets loose a report from the anti-RMT squad they have on the Final Fantasy XI staff. These individuals are purposed with one goal: to keep the paths and streets of Vana'diel clear of monster-farming TOS-breaking gil-sellers. It's a thankless job, and even here on the site we've had people complain that it's not working. Still the reports come out, and still we see the company release word that they've dropped the banhammer on another few hundreds of individuals. It's a never-ending race, with the rats always one step ahead of the cat.
The most recent report seems to indicate their previous actions against farmers who focused on fishing have been somewhat successful. The also make mention of some anti-farming techniques implimented in the May update, with further techniques added in this most recent June update. Between these two they're hopeful named monster hunting will continue to decrease. They've also released some numbers on recent bannings, trying to give us a sense of how active the team has been. Movement enhancers look to be the most-affected group, with 400 cheaters kicked in the first month of June alone.