Joes Crab Shack Coupon! This post may contain affiliate links. Please see the full disclosure policy here. Posted on August 4, 2009 Written by Mary Leave a Comment Head over HERE to sign up to receive email updates and coupons from Joes Crab Shack. I received a coupon (took about 24hrs) to get a FREE appetizer (up to 8.99) with any entree purchase!