Okay, so it's a "time out" more than a full on banishment. The Kos version of a cult "shunning" to make a point. OPOL represents too many page views to Kos for him to risk losing him, he's just trying to make a point and get him, and anyone else thinking of defecting from the party line, to get in line and shut up. Like a company town boss suppressing a workers revolt.