It turned out that they had such a point of the rules
The Customer guarantees not to disclose any information, obtained from the Service support operator, in any channels of communication. Violation of this rule will lead to the account termination without refunding of the remaining balance of the account.
but before that there was no such point!I just checked the 'wayback machine' website (to see if they actually added that paragraph in the 'Terms' recently) and it seems like that small paragraph has been there for quite a while:
https://web.archive.org/web/20181004155211/https://www.livecoin.net/en/useragreement so, i'm not sure what you mean by "before".