What always confounds me about these games is that they make more money every time. While pre-order figures and total revenues aren't exactly correlated with total final sales, they're very good proxies (but high pre-orders could just be shifted early purchases from entrenched fans and total revenue could be the same, but shifting them from $60 standard to $100 SUPER AWESOME edition).
Which means it's fairly reasonable to conclude that, with every release, more and more people are playing Call of Duty games. Which means either more and more kids are hopping on the train (hurray, angry pre-teens!) as they reach the age where they can somehow acquire the game, or people are honestly deciding to wade into the CoD toxic swamp even as they see people drowning in it.
Which means it's fairly reasonable to conclude that, with every release, more and more people are playing Call of Duty games. Which means either more and more kids are hopping on the train (hurray, angry pre-teens!) as they reach the age where they can somehow acquire the game, or people are honestly deciding to wade into the CoD toxic swamp even as they see people drowning in it.