Most people will be embarrassed to buy it. This is a marketing method, and 80% of them are selling services. It's no different from a beggar kneeling down and begging for alms when he sees you. Don't worry, his shoe polish will never exceed two yuan. For the huge economic benefits, he is willing to kneel and shine shoes, which is in line with the laws of capital. For high returns, some people's lives (such as drug dealers) can be spared.

For modern people, face is far cheaper than money. I don't think highly of those who are willing to do so. Think about how long you can earn ten dollars. He earned it by bending over. I will ignore it and not buy it. Learning to look at the world coldly is actually very important. If you think that face is not the first important thing, then you are mature.