Obviously, you have no idea what you're talking about.
By "fickle", I meant that they are less likely to stay on the Fatman and help grow the server community. Fatman's population has been dropping (not even in the top 20 anymore) while Ebon Hawk, for example has stayed pretty steady or even grown. So it's pretty clear that people who had level 50 mains on origin servers that became ghost towns rerolled new characters on the Fatman. And once server transfers were in a good portion of them jumped ship to play their original characters.