They also likely were involved in the the original question getting posted so they could provide that answer which is what makes it an entirely fabricated grift
Hard to recreate but at the time I commented it was also the top comment with only a few others and it was on the front page. I've been a HN'er for a while and this is a rare situation to say the least if it's not a setup. I'm not willing to die on the hill and would gladly admit I'm wrong, I just see it as very suspicious forum spam as the most likely scenario