Sean Parker Leaves Founders Fund
techcrunch.com
techcrunch.com
You can argue whether the tone is necessary, though, and judge TechCrunch based on that.
He's what half the bros in Silicon Valley want to be. I suppose that makes him newsworthy to many.
But, to answer your question (for better or worse again), it seems to me that what he does primarily is start and invest in tech companies. And at least once, get married in a forest.
Newsworthy to Techcrunch? Anything related to a "celeb" in this business to Techcrunch would be newsworthy. But I would say this would be of interest even to the WSJ because it fall under infotainment.
Likewise, something involving a top commenter on HN would be newsworthy to HN. But not elsewhere. Maybe maybe to some blogs if there was a good story to tell.
Something about PG would be newsworthy on HN, Techcrunch, and if it was particularly unusual, say if PG was detained in Mexico, it would be newsworthy in many places whereas if it were you that was detained, it probably wouldn't be.
So the question really is in many cases to what extent is someone a celeb in a business that "normals" care about. Or important enough that normals might care about it (like if a top guy at Volvo was arrested for drug dealing that would make the news almost certainly because many "normals" know about Volvo).
If this was a genuine question and you were expecting some informed answers, consider writing it in a different way. It hasn't attracted very high quality responses.