Sharing isn't Costco's favorite thing, and there are strict rules about what non-members can do. Take these rules under advisement before you shop.

A yearly Costco membership costs $65, but with the $45 gift card promotion that’s running with StackSocial, you’re getting your membership for $20. Take advantage today.

A Costco Gold Star membership costs $65 a year, or $130 if you want to upgrade to an Executive membership that gives you 2% cash back on your purchases. And for many people, either fee is more than worth paying. But if these signs apply to you, you may be wasting your money by paying for Costco access.

Don't miss this deal to buy your own Costco membership and get a $45 gift card, effectively cutting the price to just $20 for the year.