When you refer your friends to join Pay with GasBuddy, they will receive a $5 discount off their first gas fill-up. After your referrals complete their first fill-up, you will receive a $5 credit.
It's clearly a site geared toward adults. It helps you connect with people on other social network. The site requires an invitation to create an account.
Referrers can get 1 star when they invite new friends. Referrals using an invitation link can get 20% off on their purchase.