Recently, there have been 4 pre-sales, but I haven't played any, Skyai hasn't made any profit, and the other 3 haven't lost either. Because the logic of pre-sale is nothing more than that, one is to refund money, and the other is not to refund money, and how much money will be refunded. 1. Those who refund money, those who refund a lot, belong to those who have a small amount of credit limit. Many times, they don't say anything at first, but after finishing, they will say they want a refund, and then they will find a group of people to complain about the situation. At this point, attention will increase, but the project party's money has already been refunded. Where will the money they spent to add to the pool come from? Usually, the airdrop is not given at the beginning of the trading session, and the airdrop is only given when there is enough money to earn back from the pool. For those with high popularity, the airdrop can still be played, while for those with average popularity, the project usually ends when the airdrop is given. In general, this situation will allow pre-sales to make a little profit, depending on the timing of coin issuance and the number of market buyers. However, SkyAI has a very clear pattern 2. Refund, if the refund is small, you can almost guess that it will be cut at the moment of refund. 3. For those who do not refund money, there may be a whitelist with a small quota for each whitelist. A small portion of this whitelist is given to KOLs, and most of it is taken by oneself. When the market opens, all the funds are poured to retail investors who do not have a whitelist and want to take on the market. A few years ago, there were still players like this, but now almost no one takes on this type of market. 4. No refunds, the amount is arbitrary. If you're not here for charity, most of the time it's pure birth, all added to the pool. If the pool gets bigger, it's not easy to handle. If a small part is added to the pool, it's also difficult to control the plate when it gets bigger. What kind of pre-sale can be made? It is necessary to determine whether this project has a need for charity, such as being the first on his platform, and whether the platform has a need to do it. Of course, at this time, it is very likely to make a wrong judgment because many platforms themselves are also pure born.