It's great for non-political blogs, it's great for mom and pop shops... This being said: it's not OK to use cloudflare's cache (and their ssl certificates) for a mixer, a gunshop, a political blog, a porn site,...
I understand part of your concern. And it would be interesting to hear your opinion. For example, the site may have a certificate issued by an outside organization, but it will still use cloudflare services, you will never know, but you will be sure of your safety.
And I’d like to point out one thing. Jambler, for example, is not a mixer, it’s a platform for the rapid deployment of mixers. The end-user who does not want to advertise the sending and receiving addresses and other data does not address to the site jambler, and not mediocre to our partners. Also, all default partners have a version of tor that helps raise the level of anonymity.