Lamarr and Anthiel received a patent in 1941, but the enormous significance of their invention was not realized until decades later. It was first implemented on naval ships during the Cuban Missile Crisis and subsequently emerged in numerous military applications.
Cash back credit card reward programs started out rather simply, offering a flat percentage rate (typically 1 percent of purchases) rebated back to the customer in the form of a check at the end of the year or a statement credit.
Here is how a prepaid card works: 1  You get a card from a store or company. 2  Sometimes, you buy a card in a certain amount. 3  Sometimes, you buy a card and then add money to it.  You can use the card to buy things in 1  stores. Your card stops working when you spend all the money you added.  You can add more money.