Well you have overpaid for the mattress. They’re identical or even inferior to the no-name foam brands that are half the price. So in a sense, the ad may have c

Well you have overpaid for the mattress. They’re identical or even inferior to the no-name foam brands that are half the price. So in a sense, the ad may have cost you hundreds of dollars. I don’t know if this is true, but it seems just as likely as not to me. Surely, for some products, it must be true; for some, it must be false. It probably resembles a normal distribution, and thus, advertising is a net negative. (if it cost nothing, it’d be neutral)