I can not understand why people choose different exchanges for bidding ... There is an exchange which is called "Binance" and the interface and protection is the best I think)
That's their right to choose for an exchange for they might not see what they're looking for in binance that other cryptomarket(s) has/have. In other words, not all cryptomarkets are design to please or going to work for all crypto investors and traders. One good reason for people trying to use other cryptomarket like Kucoin is that crypto investors and traders like to have dividends which KuCoin offers.
I once traded in kucoin and it was very good,
it was very good in handling problems, hopefully it could still be trusted by the public