Mark Zuckerberg built the worth of Facebook convincing advertisers it can influence people to buy their brand, yet why all the sudden does Facebook's influence

Mark Zuckerberg built the worth of Facebook convincing advertisers it can influence people to buy their brand, yet why all the sudden does Facebook's influence not apply to deceptive news? Remember Upworthy? It had misleading clickbait headlines and within one week it was gone from the Newsfeed. Facebook has the skills to fix this. It has been said the media has a liberal bias. Conservative media denies that global warming exists. Liberals and the overwhelming majority of scientists accept it does. Can you name one issue where conservatives and scientists refute liberals?