One of Evreward's most popular merchants since 2005, Zappos offers coupons, cash back rebates and rewards, with savings as high as 50% off. Zappos discount coupons are rare, only available once or twice a year, and can be less valuable than similar merchants. Even when Zappos doesn't have a coupon, you can always get up to 20% cash back, and other great rewards, with every purchase.