The possibility of the U.S. outlawing TikTok kept influencers and users in anxious limbo during the four-plus years that lawmakers and judges debated the fate of the video-sharing app. Now, the moment its fans dreaded is here, but uncertainty over TikTok’s future lingers.

On Friday, the Supreme Court upheld a federal law that bans the immensely popular, trend-setting social media platform starting Sunday unless its China-based parent company, ByteDance Ltd., sells to an approved buyer.

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