To be so sure that isnt true, you must have some data to counter the argument? You must surely have something other than "but mah serva has da queue sometimes".
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You are confusing an active sub with a person. Blizzard have said before that roughly 10% of the original wow players remained, and iirc that was at the end of cata. Again, please learn the difference between a sub, and a person. Let me try to help you out. A game could launch with 1million subbed players. 1 year later, it could have 2 million players, but having lost 100% of its original players.