There are many scam exchanges, you are the one looking for problems for yourself by trying to use exchanges that are not the popular ones that are always mentioned here and used by many cryptocurrency users. Why did you need to go searching for others, or have you never heard of Binance, Kucoin, Okx? @OP. Those are common exchanges, that even though cannot be trusted fully to keep your investments, but can be trusted for their long time in the market and old reputation.