Only, when you go to buy something on Amazon and you're using its card, you will be offered a discount right away. At checkout time, you can choose to reduce the price by using this cashback figure. All credit card experts say no, though, don't do it. Pay the full price and let your cashback accrue through the month.
Does the Amazon card give you credit when you buy gas from a warehouse club ? Do you get 1% or 2%...all credit cards that I know of only give 1-to 1.5%...except buying at costco with their credit card.
I've caught two separate cases of fraud that way that I would not have caught otherwise. The first was a $25 charge for gas at a BP. Just reviewing a statement 30 days later I would not have questioned. But, from the text I knew something was up. And, when I called the card company they told it had been made 300 miles away. (It also helps with Apple's "Family Sharing" since I have the Apple Alert turned off.)