I've figured that WoT is a "free" game where you have to register in order to play. My question is, does anyone ever unregister from WoT? Or are the only losses in the player count those that have been permanently banned for cheating?
Knowing the number of paying subscribers is the only valid method to compare the real player count. The monthly fee for AH is an easy way to tell the number of active subscribers, for WoT you'd have to keep score about players making upgrades to their vehicles by using credits, bought or earned, during a relatively short time. A year might be too long a period considering the amount of early teenagers who'd download the game, die a lot, pay for the best gear, die still a lot, quit for frustration.