In a landmark ruling, a California jury has determined that Meta and YouTube are liable for harm associated with their addictive product features, ordering $3 million in compensatory damages. This case challenges the traditional distinction between platforms and publishers, suggesting that platforms can be held accountable for the behavioral impacts of their product designs. The ruling emphasizes that responsibility extends beyond intent; platforms must consider how their systems influence user behavior at scale. Founders are advised to view this as a live risk category and to measure user behavior proactively. Although the verdict may undergo appeals, the implications for platform accountability are significant, potentially leading to more legal scrutiny and innovation in how platforms operate. The case underscores the need for platforms to demonstrate safe outcomes rather than simply asserting their positions.