The Mathematics of WoW

According to Wikipedia's article on WoW (World of Warcraft), they, as of March 2006, have over six million users. For the record, this is for an online fantasy role playing game. These six million users are paying aproximately $50 to start playing the game, and then are paying anywhere between $12-$16 per month to play it. Let's do the math:
$12 (the low figure)
x12 (the number of months in a year)
----
$144 (The amount per yer each player is paying)

$144 x 6,000,000 = $864 million a year (the low figure)

Same math with the higher figure:

$16 (the low figure)
x12 (the number of months in a year)
----
$192 (The amount per yer each player is paying)

$192 x 6,000,000 = $1.152 billion a year

Now, if you look at the starting cost:

$50 x 6,000,000 = $300 million


That's a lot of money for a game about dwarves, elves, etc.

Hey, Blizzard, can I have some free money? Please? I don't really want much... Maybe only a couple mill? (lol)

Interestingly, China has implemented regulations that will, in theory, prohibit minors in their country from playing WoW because it is possible to kill other players in it...