(deimorz is former Reddit staff and now operates a Reddit competitor)
I think the first comment is quite short and, while it doesn't bring a lot to the table I think it's a feeling echoed by a many in the current community. (Not necessarily me, but the zeitgeist seems to be there). So, in this light, doing a disclosure on each and every comment is... Unreasonable, especially if it's something you feel deeply about.
The latter breeds the trust for the former to work.
That means that, in my point of view, Deimorz raised a good, but biased point while failing to fully discose the contest within his comment, and notatoad brought extra missing context. Both, good things. But I would refrain from painting Deimorz as intentionally misleading, considering this, at most, unintentionally misleading.
I don't think that's what happened here; in the same way that you saw Deimorz's comment as not malicious, I didn't see the response mentioning their connection to the issue as malicious either. You mention that the "disclosure was done sometime in the past", but I had never heard of them or the site they founded, so I found the comment replying with context to be informative.
I knew some context that i thought was relevant, so I added it. I wasn't trying to pick a fight.
None of that's very relevant here though, other than showing that I'm intimately familiar with the dynamic from spending a lot of time on both sides of it.
It's not a competitor to Reddit in any meaningful sense though. If anything, my "target user" is almost the complete opposite of what Reddit prioritizes now. Calling it a competitor probably only makes sense if you still think of Reddit as the way it was like... 5-10 years ago.
It's invite-only to register, but feel free to email me at the address in the blog post and I'll send you one. (That offer's open to anyone else too.)
Thats a pretty good argument for it to be relevant.