When I was a teenager pumping gas circa 1967-68 at the local Atlantic station we gave out S&H Green Stamps. Some of our customers were die-hard Green Stamp fans. They would give you cash for the purchase and say "don't forget my Green Stamps". Now that I think of this topic I realize that most of those folks were old enough to have been through the Great Depression and had that scrimping and saving ethic well ingrained into their head. Which is something more folks today should have.