I don't know this guy, but how can he confirm this? does he possess any inner information? why I got the feeling that he is so eager to put a conclusion on this when it is still open for debate at this stage.
According to this tweet [0] they have a "threat intelligence" department that continually monitors for potential issues. It makes sense that they would be on the lookout for leaks of this nature, as they are highly dependent on correctly verifying and identifying their customers.
[0] https://twitter.com/cz_binance/status/1543700689611792386