CEP Senior Policy Advisor Dr. Hany Farid writes: "Social media companies have failed us. How do we fix an industry that has proven that it is unwilling or unable to govern itself? We have tried scathing exposes in the media, #deleteFacebook, congressional hearings, and legislative relief. These efforts have not been enough. Even after years of repeated and spectacular failures on the part of the titans of tech, each week brings a new revelation of even deeper and more troubling problems in the industry. It’s time to hit them where it hurts: the bottom line. Advertising constitutes upwards of 90 percent of revenue for social media, and only 10 companies account for nearly 15 percent of digital ad spending last year: Expedia Group, Newchic, Cox Enterprises, Walmart, Harry’s Razors, Qurate Retail Group, AT&T, Dyson, Comcast Corp., and Capital One Financial Corp. The CEOs of these 10 companies hold the power to bring change."