Our research shows that sometimes the most effective way to market something is to say that it isn’t for them. Imagine you are searching for a new mattress online and find something surprising. The retailer displays an ad featuring a “Mattress Comfort Scale” running from 1 (soft) to 10 (firm), followed by the message that if your firmness preference is at either end, this mattress is not for you. Wait . . . what? A retailer telling someone not to buy its product? No way!