Ruby Tuesday is offering a $15 bonus coupon with the purchase of a $50 gift card. The offer is available online only with the bonus coupon being sent via e-mail within two business days. There are some restrictions, so be sure to review their FAQ page first. Plus, the coupon is valid from May 13 through July 15 — so you have a few months to redeem it. Unfortunately, you cannot get the deal at the restaurant. As an added incentive, they’re offering FREE shipping. The offer expires June 16.