Quote Originally Posted by Nektulos-Tuor View Post
World of Warcraft loses almost 70% of its playerbase a month after an expansion.
There's a drop off after an expansion, but let's try using real numbers when making a point instead of just making them up, shall we?

As you can see in this post, the largest drop off World of Warcraft has ever had from the peak after an expansion's release was for Warlords of Draenor (the current expansion).

That drop off was 39% in the first three months, and a further 15% (based on the peak) in the three months after that, for a total of 44% in six months, rather than 70% in a single month that you stated.

Burning Crusade and Wrath of the Lich King both increased their subscriber numbers over the duration of the expansion, Cataclysm had a -5% in the first 4.5 months, and -24% over the length of the expansion (with the last ten months of the expansion adding no new content) and Mists of Pandaria was -4% in the first three months, -32% at the lowest point of the expansion (with the last thirteen months of the expansion adding no new content).