Errata: On reason number 3, the string "Facebook," was cut out from the text when I posted the thread, I only noticed it now and I can't edit it anymore. This seems to be some kind of algorithm from Hacker News, as the thread was originally supposed to be named "6 Reasons Why Cloudflare is a Threat to Internet Privacy", and was transformed after submitting, too.
It would be good to know how many traffic goes into the proxy, to have an accurate understanding of their plain traffic capabilities.