After the opening of the gym, if the price of your pre-sale card is really lower than the actual operating price, or the cost performance ratio is higher than the actual operating price, then there is no scam. Of course, these two values will also change due to objective conditions. For example, the attendance rate is basically low after you complete the card, so your cost performance and price advantage simply do not exist. In fact, some gyms are dead, and the attendance rate will definitely be low after you finish the card, so you will do the annual card and pre-sale. If everyone has the same attendance rate as going to work, the fixed space of the gym can never carry high-density passenger flow, so the attendance rate determines whether you are fooled. This also depends on yourself. Another possibility is pure fraud, that is, after the gym is pre-sold, for example, if you have a two-year card, the gym will close down within two years. In this case, all the people who handle the card are victims. Of course, the gym didn't cheat on purpose. After all, operators are also for profit, and the reasons for bankruptcy are mostly caused by poor management. Pre-sale is basically something that every large traditional gym has to do just after opening. There is a simple reason. After opening up, the return of funds will slow down for a period of time. At the time of pre-sale, part of the cost can be recovered, and at the same time, some consumer groups can be seized. As long as they are properly managed, these consumer groups will renew their cards.