I think what the grandparent wanted to say is that every sharp S (ß) in the article should actually be Beta (β). The article probably refers to a certain slide[0] Jonah Peretti's presentation[1] "Mormons, Mullets and Maniacs" which actually uses a sharp S in italics. Seems to me like it should be a Beta indeed, especially since using a sharp S in this context would be rather unusual as far as I can tell.

[0]https://amp.businessinsider.com/images/4c655d457f8b9a711c7d0...

[1]http://www.businessinsider.com/jonah-perettis-awesome-viral-...