Important: The $50 Digital Costco Shop Card is available to new members only, or those who haven’t held a Costco membership in the past 18 months. If you already have an active membership, this offer won’t apply, and the Costco Shop Card will not be issued

And if you have “Spend $50 or more, earn $10 back at Groupon” Amex offer then you save additional $10.

This deal is similar to current FP deal directly with Costco but only advantage here is additional $10 savings from the Amex offer which could be YMMV.