A number of conservative journalists had their accounts suspended by Twitter for allegedly violating personal privacy rules though some of them had their accounts restored but for one of them (Drew Harwell of The Washington Post), the reason given for the suspension was a screenshot he posted on one of Twitter’s competitors (Mastodon).
Twitter has come under fire with its newest rule over linking to other social media sites https://twitter.com/fiatjaf/status/1604537405205356544?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1604554444544393216%7Ctwgr%5E4ab1152a791c51c2ea5c0bec9c27c17582a10aa0%7Ctwcon%5Es2_&ref_url=https%3A%2F%2Fwww.theverge.com%2F2022%2F12%2F18%2F23515221%2Ftwitter-bans-links-instagram-mastodon-competitors
Though it appears that Elon Musk is reconsidering this policy since the page appears to have been deleted.
https://www.nytimes.com/2022/12/17/business/media/twitter-reinstates-accounts.html
https://mastodon.social/@drewharwell/109527398462508424