I was thinking about the reasons this article is HN's first page. When the article is not about technology or startups, is it because the site is well executed

I was thinking about the reasons this article is HN's first page. When the article is not about technology or startups, is it because the site is well executed or because the subject is interesting? Probably both. I would like to point another reason: the Gracie jiu-jitsu empire is an example of well executed and successful start up. Their marketing techniques are remarkable. When one of the Gracie brothers opened his school in my city, he offered a considerable quantity of money to any local fighter that won him. Then, he beat the first guy that accepted pretty bad, not serious injured but it was not nice. Result: no more challenges, brand exposure, successful marketing.