I get why they did it, it makes for good branded content. But I was a bit confused in the article, which PR's? Are they just talking about PR's closed at Facebo

I get why they did it, it makes for good branded content. But I was a bit confused in the article, which PR's? Are they just talking about PR's closed at Facebook? Or PR's closed anywhere? I think the author should have heard one phrase before starting on this blog post: correlation does not equal causation. In other news I'm working on a blog post about how the Facebook outage caused temperatures to drop 20% in New Jersey. Idk it's either Facebook or a cold front