I don't think there are either. However, dkbit98 did share that
reddit post where a user claims that he received a phishing email after purchasing one of their devices.
Reddit users are... inexperienced to say at least.
Most of the people commenting there on crypto subs literally have not a single clue. These are the people who fall for phishing mails.
Just because some people on reddit claim something, this doesn't make it true. In fact, you should always assume that those people made the mistake themselves.
I guess there's always the possibility of something being overlooked (the baddies are always so ingenious), for example: man-in-the-middle attack or even some sort of 'inside job'. As in the recent twitter case.
They may not even know they are leaking data. Purely speculation on my part, of course...
A MITM is not related to that and wouldn't have any influence.
Whether it is an inside job or not, you do know when you are leaking data.
It's not something which "just happens" without being noticeable. There is enough evidence and there are definitely enough traces to see that data has been leaked and how it has been leaked.