They work if we buy the thing. I can sing the shake and vac song, but I've never bought the stuff in my life.
Also there are ads on tv that I remember every time they come up, but couldn't actually tell you what they are for. I just zone that out a lot of the time.
I'm an advertiser's nightmare. I buy more or less the same groceries every week, usually based on price. I buy almost all my clothes in charity shops. I hang onto tech as long as I can.