When a user posts a link on Facebook, it's not just a hyperlink as Berners-Lee envisioned. It is much more advanced and displays information from the linked page, including, for news, a headline, a main image, and sometimes a summary of the news that users would see if they clicked on the link.
On Facebook-owned Instagram, user options are even more restricted. People can post photos and text, but they cannot share links directly to other websites.
According to the author: "In my opinion, both cases show that Facebook doesn't really want an interconnected web: it wants to keep its users on their own platforms."