Your friend has to sign up through your unique referral link, then make a real money sports wager of at least $10 in order for you both to receive a $50 free bet. FanDuel members can earn online free bets if they successfully refer friends to the site – this is dependent on state and at the time of writing includes Arizona, Connecticut, Illinois, Iowa, Kansas, Louisiana, Maryland, Massachusetts, New York, Ohio, Tennessee, Virginia, or Wyoming.