Twitter says they did it "due to a violation of Twitter policies, in particular the Counterfeiting Policy." The precipitating event was a lawsuit in India and

Twitter says they did it "due to a violation of Twitter policies, in particular the Counterfeiting Policy." The precipitating event was a lawsuit in India and the subsequent reactions. This article gives more details: https://reclaimthenet.org/twitter-bans-sci-hub/ https://reclaimthenet.org/twitter-bans-sci-hub/