1xbit never blocked an account due to multiaccounting, and certainly did not take any winnings for it. Anyone can have more than one account on 1xbit and this is official information.
If someone was losing winnings, it was because he was cheating and withdrawing the amount of the deposit from his other account.
As for the last two complaints that appeared in this thread, we do not know anything about them, except that as usual, they are fresh created accounts and probably, like others, they will spam this thread without even waiting for a support response.