“Manipulative advertising based on personal characteristics is far from the passive distribution of third-party content Congress envisaged when it adopted Section 230 a quarter century ago. And behavioral ads drive many of tech platforms’ worst pathologies—the surveillance, the addiction race, the data pilfering. But Section 230’s shield from liability is worth far more to Big Tech than even behavioral advertising. Section 230 is the giant government subsidy on which Big Tech feeds and has built its empire.”