Did you skip the paragraph the poster was referring to? They were referring to older social media where you would pick which users to follow and those would be

Did you skip the paragraph the poster was referring to? They were referring to older social media where you would pick which users to follow and those would be shown to you, which mirrors RSS, a comparison explicitly mentioned in the article. The point is that now it is getting more and more "pushy", but previously it was very "pull" based when compared to traditional education.