Most centralized BTC exchanges compromise both security and ethics by putting their sites on CloudFlare. This article explains why CloudFlare is harmful to all:
CloudFlare is very harmful to the Tor community in particular. So whenever someone mentions a CloudFlare-MitMd bitcoin service, they should be directed to bitsquare as a secure option.
Note that the Tor project itself uses a Tor-hostile service (bitpay). Efforts should be made to get the Tor project eating their own dogfood, as well as to simply point out bitsquare as one of very few Tor-friendly options to Tor users. We should monitor this Tor ticket and pressure them off bitpay: