https://www.vox.com/recode/22217705/facebook-twitter-youtube-parler-insurrection-trump-capitol

But they stopped short of shutting down the President’s accounts

Social media companies are grappling with the aftermath of the violence and insurrection that broke out on Wednesday at the US Capitol. But despite plenty of time and warning, the platforms still seemed unprepared to respond to President Trump’s calls for an uprising in the wake of his election loss.