The Rollbit Referral Scheme is pretty delicious. You benefit from Referral Codes when a new user enters one of your codes. You will receive 10% of the house edge on all bets placed. You can generate up to ten distinct codes. However, once a code has been created, it cannot be deleted. You can view it on the referrals page at any time. Using a referral code does not mean your earnings increase by the way. It just gives you a discount.