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I have pre-ordered mmo games for many years (since 2004). In almost every case the company did not charge me until the game was released. I just pre-ordered Diablo 3 and I find my credit card has been charged. I consider this an action of greed as the game will not be out for another two months - nor do I have access to beta (which I would consider reason for being charged). My opinion of Blizzard, which has been dropping since the Activision merger, has just reached bottom. Blizzard is now all about the money. They have kicked all the real gamers out of the company.
No I am not going to get a refund but if I do decide to get MOP I will not do it in a pre-order. Fool me once shame on you. Fool me twice shame on me.