I know there are a lot of COD and Activision haters but OMG there are some truely insane stats linked to the call of duty series and it seems that it just keeps growing and getting stronger every year.

Nice little stat:

Activision announced today that Call of Duty: Modern Warfare 3 has earned one billion dollars in its first sixteen days on sale. This beats the record of James Cameron's film Avatar, which crossed the billion dollar mark in seventeen days back in 2010.
Another nice little stat:

According to Activision, over thirty million gamers are now a part of the Call of Duty community, which "now exceeds the combined populations of the cities of New York, London, Tokyo, Paris and Madrid."
http://xbox360.ign.com/articles/121/1214548p1.html

Say what you will but the game is a money making machine and as I have found out its still a huge amount of fun.