Tracked by Evreward since 2011, Wag.com offers coupons and cash back rebates, with savings as high as 50% off. Wag.com discount coupons are seasonal, appearing every three to four months, and are often more valuable than similar merchants. Even when Wag.com doesn't have a coupon, you can always get up to 10% cash back, and other great rewards, with every purchase.