Just go here and the last post and copy all the emails and then go to invite friends page and paste it in the first box and type 'Mafia Wars' in the second. hit the Invite button then. you will...
It's called GodFather Point, it can be used for advance i game like buy skill point, buy member, regain full energy, stamina, and health. You can buy that favor point or gain it for free 1 Godfather...