Do you refuse to buy anything at Bed Bath & Beyond without a coupon? So does everyone else, apparently. While the company is making plenty of sales, they aren’t as profitable as they used to be… something that experts attribute to chain’s training its customers to always come in clutching a coupon. 20% off might not seem like a killer deal, but it adds up if you bring a coupon every time you visit, and use a 20% coupon on every item that you purchase.