The main reason why I choose this exchange because they are the only one exchange available for my Altcoins.
Any coin or token which is only listed on a single, unknown, shady exchange, isn't worth your time or money. You will end up being scammed by either the exchange or the token itself.
You can identify them by reviewing some feedbacks about that particular exchange if it is suspicious dont ever give your personal data to them.Coinmarketcap has a lot of sh*t exchanges listed but I guess CZ will remove it one by one. You can verify some exchanges on coinmarketcap only search the name of the exchange, you also look on coingecko to look for exchange data.
Your default position should be to not give your personal data to anyone. And just because an exchange is listed on Coinmarketcap or a similar site doesn't mean it is automatically legitimate. These sites are simply a list of coins, tokens, and exchanges which exist. They do zero research as to whether or not they are scams.
Often bounty hunters are faced with new exchanges to sell altcoins that they get from bounty. There is no other choice for them if they dont sell it there and they have to bet with the security of their money and personal data like KYC that is needed.
The other choice is to stop spamming this forum and other websites with adverts for meaningless altcoins and tokens which exist only to make their creators easy money. They are all scams.