This “guide” is a bit of a joke made out of frustration.

Apparently, that was some other Zuckerberg project: https://www.metro.us/everything-to-know-about-facemash-the-site-zuckerberg-created-in-college-to-rank-hot-women/

As I understand it: because not enough people will use it through these ways, leading to not enough motivation for the dev(s?) .