> If the purpose of this was to promote their academy or school or whatever, what was the point? Because at this point, they have lost all credibility and respect and HN isn't a gullible audience so I don't understand the point of why they did this

It’s the top voted comment right now. Their comment history has similar comments with links to their products and content.

I think they’re doing it because it was working for them. I bet they’re happy with the additional traffic they’re picking up for a minute or two of promoting an LLM and then appending a link at the end.