Farmville credits have no intirinsic value so you cant use them for money....
My oldest sister dumped a lot of money into her farm. My middle sister is about to get disability due to how she got hooked on it. My middle brother played Farmville all his waking hours while on unemployment, but has since reentered the workforce, leaving the game. My younger sister did it strongly for a while, but left prior to getting hooked. My younger brother plays one of those mafia games of which he's put tens of thousand into his main tune until he learned to get all the gifts free during glitches. He's now able to take a new toon and level it up greatly within a week, all on automatic pilot. My nephew plays those violent video games on his xBox, then tries to fuck the dog before going to sleep.
I'm the only sane one in the bunch.