Interestingly, this is a site I saw (more than once) promoted by HN users on threads that discussed investing as an individual. It gave off immediately sketchy vibes as a Malkiel-acolyte, I tend to be skeptical of individuals who claim to generate long run alpha in general - let alone someone willing to sell this magic sauce. Based off the settlement, it sounds like unfortunately a large number of people were taken and for likely not insignificant funds. I hope this is where the buck just gets going, rather than where it ends.
I will see if I can find an archived comments page containing the reference because I'm extremely confident there was at the very least one extensive comment chain discussing it - I know a couple of discussion threads on the broader topic of individual investing in general got nuked due to obvious promotional spam/other flamebait topics. I know it was brought up on a discussion regarding robo-advisors in the last few months; I'll dig more aggressively and see what I can pull up.
It doesn't match the description either, but I can't/haven't ruled out there are others. But I would agree that this doesn't appear to be regularly discussed on HN, and I'd speculate this bug/imperfect performance from Algolia is due to this term being rare in the corpus of HN comments.
I know we have a strong faith in being surrounded by serious people here on HN, but I'm sure there are at least a small percentage of accounts who are people with a desire to influence the crowd (whether paid shills or not).
Seriously, what does it cost a manger at RagingBull or anywhere else to have 2 or 3 accounts with enough karma not to get flagged as new, to chime in on some thread about trading? They could easily have a well-seen comment (comments here number in the hundreds, not tens of thousands like on Reddit) and influence a fair number of wealthy tech people.
Heck, if I saw three different users agreeing with each other on an HN thread about some product, I'd definitely be curious.
I have to remember myself how much of what I see is manipulation, even on a site like HN.
As I said above, given that the article(s) in question had loads of comment chains being deleted for promotional material and other low quality content, I wouldn't be surprised.