Those were the final straws:
"This was the second time in a week Twitter had taken action against the president’s account. Twitter removed three tweets that promoted conspiracy theories about the election and locked Trump’s account on Wednesday, citing “a risk of violence,” after a violent riot at the Capitol. Trump’s official @POTUS account is still active, but if the company determines he’s using it to evade the ban, it will take action to limit its use, a Twitter spokesperson said in a statement." https://www.nbcnews.com/tech/tech-news/twitter-permanently-bans-president-donald-trump-n1253588