Thank you for the comment.
Yes, I like these visualizations, too. Sadly I have to admit that I did not create them.
My article is actually a comment on a Bachelor Thesis about German alternative and mainstream media and conspiracy theories. The visualizations are related to their Facebook pages and their interconnections.

In his blog, the author says, that he used a statistical database structured by netvizz in order to get the data from Facebook. Then, he downloaded the data, put it in an sql-table and visualized it via Gephi (open source visualization program).

Under the interactive visualizations there are also the signs of the «Oxford Internet Institute» and «JISC«.
http://holnburger.com/blog/graphs/VT-Nonmodular/network/index.html
http://holnburger.com/blog/graphs/VT-MM-Nonmodular/network/index.html