Trump absolutely, habitually broke the rules. Most of his Tweets were labeled as a violation of Twitter rules.

Also, his followers are planning more violence around Inauguration Day. Twitter doesn't want anything to do with that.

There is a smaller platform, Parler, where conservatives were flocking to. They seem to have no moderators there and have allowed people to post violent threats against politicians and journalists. Parler is now removed from Google Play, Apple, and their Amazon server.

Parler was Twitter's biggest competitor. But it's not looking good for Parler.