Actually you're wrong. The 6 million number does NOT count expired accounts. From their press release here: http://www.blizzard.com/press/060119.shtml
"World of Warcraft's Customer Definition
World of Warcraft customers include individuals who have paid a subscription fee or purchased a prepaid card to play World of Warcraft, as well as those who have purchased the installation box bundled with one free month access. Internet Game Room players that have accessed the game over the last seven days are also counted as customers. The above definition excludes all players under free promotional subscriptions, expired or cancelled subscriptions, and expired pre-paid cards. Customers in licensees' territories are defined along the same rules."
Slashdot Mirror
Actually you're wrong. The 6 million number does NOT count expired accounts. From their press release here: http://www.blizzard.com/press/060119.shtml "World of Warcraft's Customer Definition World of Warcraft customers include individuals who have paid a subscription fee or purchased a prepaid card to play World of Warcraft, as well as those who have purchased the installation box bundled with one free month access. Internet Game Room players that have accessed the game over the last seven days are also counted as customers. The above definition excludes all players under free promotional subscriptions, expired or cancelled subscriptions, and expired pre-paid cards. Customers in licensees' territories are defined along the same rules."