... by... tracking... kids? No, I don't think so. You have a pretty weird conception of what HN readers do for a living.
> what HN readers do for a living.
Work for one of the FANGS, a social media platform, in ad tech, in big data (anything with humans) or any company that monetises through a) advertising or b) selling user data.
I am sure there are some people who work in financial services as well but they are probably considered to have lower moral standards.
Isn't that how the vast majority of the net worth of NH readers was generated?