Another thing you may want to note:
Time Period: Jun. 11, 2015 to Jun. 17, 2015
・Accounts receiving disciplinary action for RMT advertising: 1120
・Accounts receiving disciplinary action for RMT/illicit activity: 4158
・Action Details: Permanent ban from FINAL FANTASY XIV

・Accounts receiving disciplinary action for participation in RMT/illegal activity: 215
・Action Details: Temporary ban from FINAL FANTASY XIV
From the "Actions Taken Against In-Game RMT & Other Illicit Activities (Jun. 18)" post. These updates regularly appear on the Lodestone.

The idea that they're doing 'nothing' about these is false. However, so long as there is a service they can sell and people who will buy it, RMT exist in games.