@tomcoates I think you're probably right. IIRC Facebook used Snopes, Politifact, and a handful of other well-known services that party-poopers like me in the comments section use to debunk fake info. They cut out the middle man and put the Snopes link in a special area under the image or text.
I was hoping that the WP fact checking was like that, but with a wiki behind it, and a huge superstructure of Calvinball rules and admins and so on to keep it legit. Sounds like that's not the case.