There are a few ways to get 500 cashback on Amazon Prime.
First, you can sign up for an Amazon Prime Rewards Visa Card. With this card, you'll earn 5% cashback on all Amazon Prime purchases. There is no annual fee for this card.
Second, you can join the Amazon Prime Store Card. With this card, you'll earn 5% cashback on all Amazon Prime purchases made at Amazon.com. There is no annual fee for this card either.
Finally, you can sign up for an Amazon Prime Rewards Visa Signature Card. With this card, you'll earn 5% cashback on all Amazon Prime purchases, plus 2% cashback at gas stations, restaurants, and drugstores. There is a $49 annual fee for this card.
You can learn more about these options here: https://www.amazon.com/gp/help/customer/display.html/?nodeId=201366360