Costco offers discounted fast food gift cards that can save you 20% instantly. Find out which ones are worth grabbing.

Your Costco Shop Card will be emailed within two weeks after sign-up to qualifying members. A physical membership card is not required to shop online or receive your included gift card.

StackSocial is giving you a $20 credit with the purchase of a Costco membership; check out how you can apply to get it ...