Probably because this post was getting lots of links for a domain that is otherwise rarely seen on FB? You can read about the challenges of spam-fighting at scale (and people actually getting paid to write Haskell) here: <a href="http:&#x2F;&#x2F;www.wired.com&#x2F;2015&#x2F;09&#x2F;facebooks-new-anti-spam-system-hints-future-coding&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.wired.com&#x2F;2015&#x2F;09&#x2F;facebooks-new-anti-spam-system-...</a>