Funny thing is that it works. 15% CR uplift in the last website where I tested it
Sellers of snake-oil and other fake "remedies" have been using this sales tactic--"your friends and neighbors have already tried it, look here, see this line of people ready to buy!" that are all plants--since the days of the horse-and-buggy.
Doesn't mean we should still keep lying to our friends and neighbors.