The information I have says that 1xBIT bookmaker is anonymous and does not require KYC verification. To confirm this, I will quote another user who claims to have used services of this bookmaker without data verification:

I’d rather fill up the KYC form that to use a scam site which is 1xBit, better to avoid this site at all cost.

Or just do some good research before you register at any casino. I always do that before I deposit any money. However, when it comes to anonymity, 1xBIT is known not to reveal any information about its players. If this is important to someone, maybe he will spend more time checking this casino and will have different opinion about them than you.

Why keep endorsing this site which have a lot of scam accusation or maybe not an accusation anymore because this site really scammed gamblers and its not safe to gamble on this site, better to stop promoting this site because you are ruining a lot of gamblers life by taking their money. KYC is ok to some and some gamblers prefers not to have it but of course they will do it on a legit site, to OP always do your research since KYC Free is not always there, expect that it can still be asked especially if you are going to deposit huge money for your gambling activities.