You have connection with Crex24 exchange and 1xbet so comparison with yobit is not very different.
We also know that 1xbit is mostly hiring spammers who previously promoted other scam projects, and most of them have negative feedback on their profiles.

If I was a moderator I would not ban any member who is wearing 1xbit signature, but I would consider banning their signatures and not allowing them to wear anything.
This could first be temporary signature ban of several months and if it repeats again it could move to permanent.