According to Blizzard, the company sold approximately 3.5 million copies of World of Warcraft: Burning Crusade within one month from its launch. This number includes North America, Europe, Australia, New Zealand, Singapore, Thailand and Malaysia.
Europeans bought about 1.6 million copies while 1.9 were sold in North America, the rest is in Australia and Asia. Blizzard sold nearly 2.4 million copies worldwide in its first 24 hours and broke all sales records. The number is greater than any other PC game sales in a month time.
Warcraft has about 8.5 million players. The record of sold copies and the number of current players of Burning Crusade, doesn't include Korea, China and the regions of Taiwan, Hong Kong and Macau. There regions has still to see this game.
Those are the one of World of Worcraft's largest customers. The numbers are based on industry sell-trough data, internal records, and reports from key distribution partners around the world. A message to those that haven't tried the expansion, in the words of the "dark portal" :"You are not prepared!".