More to the point, how many people who are caught up by fake news actually read the original article? The pattern is to: (1) Publish a fake article on a propaganda site (2) Tweet it out from a sockpuppet account (3) Use paid promotion or hacking to get it retweeted by a few influencers (4) The unassuming masses amplify the message by repeating the headline in the tweet. By the time anyone notices that the source of the misinformation is a fake news site the story has already traveled around the world two-and-a-half times. NewsGuard may as well flag twitter.com in that case.