Actually, I was on the list and my case was resolved - I have received deposit back. I have also found some user on reddit, which was treated the same way as I was, he posted a video with his bets:
https://www.reddit.com/r/1xBit_gambling/comments/p2wdxq/this_is_how_this_bookie_treats_the_customers_who/

Of course the post was removed by the moderator (1xbit worker probably).

I know that multi-accounts could be a reason for some "victims". And it could be a reason for me even if I've never had any account there before. My only guilt could be that I have played with my colleague (which was very good at low-tier esport games) so the system marked me and other players as the same guy. (you know, when pro tipster gives his tip, many people bet the same at the same second). But it's not 100% case because in my group me and maybe two other colleagues were banned while other kept their accounts.

This was game over for me because there's no other betting site which has such wide sports offer, especially esports. Also my colleague has terminated his services because many people was banned sooner or later and there was no point of that.