Game developers spending time to combat RMT is an economy in itself. You'd be surprised how well they market it.
Banning 10,000 farmer accounts guarantees another 10,000 will be created. Game CEO wants a new Nissan? Ban 5,000. Penthouse in the city? Ban 30,000. <-- although it won't always be like this, there are cases where that's the end result.
Somehow I get the feeling I'm about to get banned here...
