Personally, I'd say you should definitely add a disclaimer, otherwise a discussion that would likely gain traction is that the information might be being intentionally concealed.
The resistance to a seemingly obvious correction seems a little shady. Expecting people to dig around a site to find out your position of financial interest is not reasonable.
Such behavior is disappointing, especially from a top HN account holder.
It's too bad, because otherwise there are some interesting ideas, but TFA is lacking in good faith.