“But the MMOG genre has no Long Tail. MMOGs just die. They have no Long Tail because they cost bucketloads of money to run. Servers must be hosted in secure facilities and they must be connected to the Internet via costly bandwidth contracts. Staff must be trained to maintain those servers. Customer service people need to answer emails and resolve customer disputes. So instead of just sitting around forever and earning a trickle of revenue for a very long time, MMOGs are the only games products that are truly shut down.”

http://www.joystiq.com/entry/1234000330056125/
http://www.joystiq.com/entry/1234000330056125/
http://www.joystiq.com/entry/1234000330056125/