6 Million is apparently enough...
Subscribers set to auto-renew on April 20th-21st weren't charged, according to Ignig.com and the Blizzard support forums, and subsequently couldn't log in to the game. With telephone lines clogged, those forums are starting to look like a PvP server. Except with more gankage. And no zone / level restrictions. Nevermind.
It seems the company’s billing system has gone on the blink, causing some accounts to be put in the inactive file since their credit cards can’t be charged. What’s worse, the customer service lines are so clogged, some players are saying, they can’t get through to solve the problem.
All of this is adding to the frustration of some players, who are now threatening to cancel their accounts. A post has appeared on WoW’s forums from company officials explaining the problem and how to fix it.
Read Ignig.com's take on Blizzard's billing problems.