Marketers and agencies have long been preparing for the Supreme Court to uphold a law banning TikTok in the U.S. if its owner, ByteDance, does not divest from the popular platform due to national security concerns outlined by Congress. That ruling came Friday, meaning TikTok could “go dark” as soon as Sunday—when the ban is set to take effect—following its pledge to do so if the Supreme Court upheld the law.