Running an MMO may not be easy, but it's hard to feel sorry for a company with 11 million customers and one of the most successful games in history. Still, third-party companies try to get a piece of the action, and Blizzard doesn't exactly appreciate that. In fact, the EULA for Blizzard's World of Warcraft specifically prohibits third-party add-ons from being used. So it should come as no surprise that Blizzard filed suit against MDY Industries for its WOWGlider add-on, and it should equally be as no surprise that Blizzard won the suit. The US District Court of Arizona awarded Blizzard $6 million in damages.