That won't change any facts, which I can't comment on the validity of, but it's important to keep this context in mind while reading these and any future documents.
As for "with the general matrix community", I believe the amount of projects and people we talk to, and still are in rooms with (which are public) will be the proof of that.
I hope you'll enjoy the read, since we believe this is not the first data leak of this kind and that your personal data might very well have been leaked if you're a Matrix user.
They were not given the choice to be part of our publication and therefore, we have no lawful basis to use their name since 1) they did not give us consent and 2) they would not have understood (we didn't say) nor expect (it was a private chat) that we will use their personal data - making Legitimate Interest not possible.
The only way we could be GDPR compliant for being Accountable and not break a lawful basis was to not use their name but the name of their role under their obligations towards us, and linking to the blog post instead (Accountability of what we claim).
They certainly are generous! I'll ask them to renew our contract!
I'm serious enough to put my name out there and own up to what I write - Are you also? Or are you ashamed?
I'll let you do your own homework and research what else it triggered.