Now there's an irresistible reason to join: a $20 Digital Costco Shop Card* when you purchase a 1-year Gold Star Membership online. Here's how this Costco promotion worksStep 1: Purchase your Gold Star Membership voucher onlineHead to the sales page to buy your Costco Gold Star Membership online. This is how you'll actually redeem the Costco Gold Star Membership online (make sure you provide a valid email address, because you'll get the $20 Digital Costco Shop Card* there within two weeks!). Sign up for Gold Star Membership ($65) and receive a $20 Digital Costco Shop Card* after redeeming online. Costco 1-Year Gold Star Membership + $20 Digital Costco Shop CardSee DealStackSocial prices subject to change.