> designed to offer discounts, not charge higher prices. And some of this has always existed. Think of stores which always offer a coupon. Customers only pay f

> designed to offer discounts, not charge higher prices. And some of this has always existed. Think of stores which always offer a coupon. Customers only pay full price if they are in a desperate rush or if they don't know. But the fact that it has always existed doesn't make it any nicer.