Facebook and Twitter are still perceived as the only real players in the social media space. People haven't woken up to alternatives like GAB and Steemit, and other legacy competitors like Google + are shutting down. Facebook, in particular, is viewed as the main long-form posting platform.

For the "fact" checkers to be moving on from Facebook is a big deal. Personally, I don't think they're leaving to protect their reputations. I think the opposite is true: they were asked to leave because people were getting tired of their obvious bias, and Facebook's stock is in the toilet as a result.

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