If they actually allow 1BTC for 24 hour time frame for non verified account then it is great but I don't think so the value should be much lower now and I can't able to find the information regarding non KYC withdrawal limit in the official website and with other article seems to be older.
Kucoin do allow unverified users to withdraw up to 1 BTC per day. Below is the last announcement they have made regarding withdrawal limit for unverified accounts.
Announcement Regarding the Adjustment of Daily Withdrawal LimitDaily withdrawal limit has been adjusted to 1 BTC for accounts which do not complete identity verification(KYC).
Thanks for the link, but while I am searching now even on bitcointalk there are many members said Kucoin ask for KYC compliance even if their limit is below the level what they mentioned for non verified customers and also some account under froze until they complete KYC so with any centralized exchange regarding KYC or no KYCed account the user should be asked to verify their Identity at anytime which is also mentioned in their ToS so yes there is no guarantee that someone can withdraw as non verified user forever.