The last documented time Cloudflare terminated services was when they terminated the account of a white supremacist website last year.
The network, Switter, was started by a company in Australia and runs on the open-source social platform Mastodon at an Austrian domain.
"Cloudflare has now effectively kicked two groups offline: Neo-Nazis and Sex Workers. There is no comparison. One used their site to call for death, the other used theirs to stay alive"
https://twitter.com/AZMos/status/986819643661791233
Cloudflare are still yet to comment on the matter.