This tells about customers who spread the news or info that the products they bought are good so people also like to see the real thing and buy. It is an appeal to popularity which is fallacious. This argues that customers should purchase a product or service because everyone else uses it. The popularity of a product alone may not validate its value, but this fallacy creates an assumption that if many people use a product, it must be effective. This is a threat to good business centers whose sales are not soaring yet the products are genuine.