Why do people join those groups for Mafia Wars?
Yes we join the groups for the game to have people add us to gain a bigger mafia. Bigger mafia, the better chances you will have for looting items, having friends complete jobs, winning in fights, making more money, getting items you need for jobs but can’t seem to find on your own, and you get special items you can buy. Though only 501 of your family members actually fight with you so the other 500 friends you added really don’t matter much. Same goes for Sorority life. I hope that helps.