I assume they cannot do the same as easily as they would like to with 1xbet, because there it is about FIAT, and Russia is sanctioned and it is a centralized system, making it difficult to steal and ghost their gamblers.
It's not really that difficult for them to steal from gamblers through 1xbet either since it operates out of Russia which is why suing them for any issue is not easy. 1xbet if far more popular than 1xbit, but they have their fair share of scam accusations.
Both sites should be avoided at all costs in my opinion.
Well, I assumed that since 1xbet is mostly a FIAT bookie, then it may use traditional methods to fund the accounts, like Paypal and cards. Usually, those payment processors have mechanisms to deal with fraud to some level.
However, since the volume of 1xbet is higher than its cryptocurrency branch, it is obvious they also could feel tempted to abuse that volume and number of users, to freeze deposits and earnings with no reason.