In my opinion, for some high-quality and very practical products, I think empty sales are completely acceptable. For example, I once met a flight attendant on a long-distance flight and recommended a very useful travel pillow. This pillow has excellent shock absorption effect, is soft and comfortable, and gives me some comfort during the sad flight. I also bought this product, and I am very satisfied with its performance. In addition, I also found refreshing novels, books and additional services on some flights, such as spa massage and so on.
However, if I sell something of low quality, useless or unreasonable price, then I will refuse it directly. For example, some rough toys, meaningless souvenirs, and consumer goods with big discounts. These products may take up valuable time of me and other passengers, thus reducing the flight experience.
In addition, I think the number of empty sales should also be limited. On a long flight, if you sell it every five minutes, it will make people fidget. After all, on the plane, everyone wants to spend their time quietly.
Generally speaking, it is completely acceptable to sell goods on the plane. As a passenger, I also believe that most people are willing to pay for high-quality and practical items. But what is important is that sales should be reasonable and moderate, and goods with obvious value should be used. If these conditions are met, then I believe anyone will like to buy these things in flight.