Becoming a member of the Thorntons fuel rewards program is as simple as stopping by a participating Thorntons location and asking for a card, explains the company's website. As of 2015, cardholders can go online after obtaining their cards and register to start earning rewards.
The Thorntons rewards program provides discounts on gasoline and other benefits based on how often a customer visits the store. During the first month, cardholders can receive 10 cents off each gallon of gas, sweepstakes entries and discounts tailored to their own spending habits at the store, according to ThorntonsInc.com. Subsequently, cardholders earn extra perks based on the number of visits they have made to the store while using their rewards cards.