That would be Facebook.
At one time I had this nifty little WordPress plugin “Add Link to FaceBook” that worked like a champ.
If I made a new post on this blog, the plug-in would automagically interface with FaceBook and share a link on my business page. “http://www.facebook.com/fortymilephoto”
Then FaceBook decided that was a bad thing to have. They first made changes to the API so you had to stay on your toes keeping up to date.
Then it just quit working, the plug-in developers decided it was way too much work for their free efforts.
So it died.
Seems Facebook wants you to compose your offsite content to their “standards” before you publish a link. It would be nice if Facebook would vet the links to be sure there are no nasties associated with the link. People will click on anything.