Coupon located in display near front door. Not an earth shattering deal but free money is hard to beat! Purchased w/ 5% cash back card (Old Amex Blue) for a little extra bump. Deal expires August 1st, 2014.
Publix in Sandestin, FL had a similar deal but it was save $10 off a $50 Shell gas card when you buy $50 worth of groceries. Not sure if stackable. Same expiration date.