https://www.reuters.com/article/us-facebook-ads-boycott/facebook-frustrates-advertisers-as-boycott-over-hate-speech-kicks-off-idUSKBN2424GS >Advertisements for more than 400 brands including Coca-Cola and Starbucks are due to vanish from Facebook on Wednesday, after the failure of last-ditch talks to stop a boycott over hate speech on the site.