Ad boycott strikes at heart of Facebook's business model

PARIS, France – Adidas, Puma, Coca-Cola, Starbucks, Unilever, Ford...not a day goes by without another big brand pulling ads from Facebook and other social media, a campaign that is weakening advertising-dependent sites but whose ultimate impact remains uncertain.

Over 400 firms have joined the #StopHateForProfit  campaign to protest hate speech on ...