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.
When you want to return an item, normally they give you cash because the transaction is closed out. However, I recently noticed a few stores have wanted to put it back on my card, but here's the twist...they run a negative charge for the amount of the refund as a CREDIT CARD. So, everyone else is right.