yeah the numbers don't lie blizzard makes around $225m per quarter from its World of Warcraft division (revenue NOT profit, their "costs" are around 65% of revenue). They make almost nothing from asia, as a partner owns it there and asian companies are very deft at claiming they make no money while keeping it all (like hollywood), plus people there don't buy the game they instead buy hours at internet cafes and play it that way. plus wow is more or less dead in asia, everyone nowadays plays the korean MMOs.
so $225m - fees for pets/transfers/etc - small amount for asia - box revenue = $200m/3 months or $65m/month, divided by average sub of $15 is 4.25m subs in US/EU. Thats pretty much held steady for the last 7 years, 2-2.5m NA subbers and 2m EU subbers, the numbers fluctuate slightly but most of the fluctuation is in asia (the "extra" 3m players who make Blizzard almost nothing).
You can pull out the numbers yourself any quarter from their report
Activision Blizzard Announces Better-Than-Expected First Quarter 2014 Financial Results | Business Wire
just look at the Online Non-GAAP Net revenues, they combine Blizzard and Activision but afaik Activision doesn't have a online sub game. They can't really fudge these numbers or they get into serious, serious, SEC-sues-you-for-$1 billion kinda trouble. They don't exactly fudge how many wow subs they have, but they don't really talk much about how Asia makes them almost nothing and that US/EU has been stagnant for a decade now - for every 1 person who unsubs, there is basically 1 newbie who plays for a short while.
MMO theorists on this board never really get that, the churn in MMOs is vast and scary. In a year, a random guild will go through 99% churn, and its all new people who play the game for a bit then quit.