You can get a high rebate of 1.5% when you use Costco, and 1.0% when you use it at other places. Rewards (points) are awarded the following year according to the amount of card usage in the previous year, and the accumulated rewards (points) can be used for shopping at Costco. Also, since the Costco annual membership fee is deducted together with the card usage, there is no need to worry about forgetting to renew.