 And participate in U.S. Taco Bell locations for a limited time only. While supplies last, contact store for participation, which varies. Cashback is not available on gas in New Jersey and Wisconsin. $5,000. That's the average amount of money people in the U.S. are now spending on gas in a year. Five grand. That's crazy. If you drive, you have to download Upside, the free app that gives you cashback every time you get gas.