John Lewis is a thieving company. They list a promotion on household goods - spend £500 or over and claim £100 back a month later if you are a John Lewis member. They do not tell you whether your order qualifies for the promotion at the time of buying, given the numerous exclusions listed in the fine print, and they do not automatically apply the promotion. John Lewis structure the promotion in this way in the hope that you will: 1) Forget a month later. 2) Buy their products, live with them for a month (through the return period) and not qualify for the only incentive to buy from them a month later. In both circumstances they get £500 of revenue on products that they are selling for a higher price than other retailers and have to give nothing in return. They are structuring these promotions in order to have the highest chance of cheating people.