https://www.vox.com/2018/4/10/17220878/facebook-mark-zuckerberg-testimony-monopoly-graham

“If I’m upset with Facebook, what’s the equivalent product that I can go sign up for?”

Facebook CEO Mark Zuckerberg is testifying before two Senate committees on Tuesday over the Cambridge Analytica scandal and revelations about the platform’s role in the dissemination of Russian disinformation during the 2016 presidential campaign.