A Los Angeles jury found Wednesday that Meta’s Instagram and Google’s YouTube harmed a young user with features designed to hook kids — in a bombshell verdict that “shakes Big Tech’s predatory business model to its core.” The high-profile case involved a 20-year-old woman who claimed she became dangerously obsessed with the apps at a young age because they were deliberately built to be addictive, using features like infinite scroll and autoplay. The tech giants were found liable for $3 million in damages. The multi-million-dollar judgment is likely to grow, as the jury of seven women and five men will...