Is this cheap gas cheat code real?!

This woman got a full tank of gas for 33 cents! 17 whole gallons to be exact. With gas prices through the roof everyone wanted to know what her secret was, well, here it is… she had a perks card from a grocery store. Every hundred bucks she spent, she got a four dollar credit. Spend enough money on groceries, and boom, a free tank. I was really hoping there was some sort of special way you hold the pump or trick that could be done. I guess it’s just that simple math.