• Advertising Age, Friday, June 3, 2011 3:15 PM

An Ad Age headline asks "How much more revenue can Activision wring from 'Call of Duty'?" Apparently, as much as the game developer can, displeasing its loyal and large gamer fanbase with reports of an online paid subscription service for the next "Call of Duty" installment, "Modern Warfare 3."

Dubbed "Call of Duty: Elite," the proposed paid subscription has gamers taking to Twitter and blogs to express their outrage.

Meanwhile, analysts predict the latest "Call of Duty" will sell more than 20 million copies. Not too shabby, Activision. And that's not including the potential paid subscription aspect.

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