Tracked by Evreward since 2005, Weight Watchers offers coupons, cash back rebates and rewards, with savings as high as 60% off. Weight Watchers discount coupons are seasonal, appearing every three to four months, but can be less valuable than similar merchants. Even when Weight Watchers doesn't have a coupon, you can always get up to $30 cash back, and other great rewards, with every purchase.