Given the sheer volume of capital that can be made from MMOs, I'm not surprised.
Agreed, that's why MMOs are spamming the market lately. At first it was mostly rather big
titles that tried to do what WoW did, but having failed to compete with WoW, producers decided to do what they should have done in the first place : Taking the source ideas that make WoW a cash cow and applying them to a game that is not a direct copy&paste of it.
So now we've got big and small MMOs all over the place being played by large numbers of players. Mostly these are free to download and free to play, but the good stuff can only be attained with real money, that way it is easier to trick the player into thinking they are not spending as much money... but the truth is you spend more money to those games than you would have spent on a game like WoW
I've spent enough time with MMOs that I'm completely bored of them, but regardless, I'm still waiting for Star Wars : The Old Republic because I'm too much a Star Wars fanboy