At the beginning of BlizzCon, they made an announcement that if you signed a contract to pay for WoW for a year (using your original payment plan), you got Diablo 3 for free, you got a free mount, and you got a beta key for MoP. I didn't see a reason not to, so I signed in, but like a cell phone contract, if you terminate it early, they can charge you *and* seek legal action.