Costco members sign up through the Costco.com website (www.costco.com). Upon successful enrollment, you will be sent a promo code for MoviePass and Fandor. Next, you enroll on the MoviePass site (www.moviepass.com/costco) and Fandor site (www.fandor.com/promo/costco2017) and use the promo code. Your credit card is required for renewal at end of the one year term. By using the promo code provided by Costco, you will not be charged again until the one year term expires.
Please note that every MoviePass account must have its own individual iPhone/Android in order to use the service. Sharing a phone will result in redemption issues.