 Cash back is not available on gas in New Jersey and Wisconsin. I can't believe how expensive gas has gotten recently. Prices at the pump are up, but I never pay full price for gas anymore. I just use the free Upside app that pays you cash back for every gallon of gas you buy. Wait a minute. Does that actually add up to anything? I've made around $200. Wow, that's serious extra cash. Download the free Upside app now to earn real cash back every time you buy gas. Use promo code GPS for a $5 bonus on your first tank. That's code GPS for a $5 bonus.