This is the thing that has always concerned me about Cloudflare. The structure of their operation is "we do a MITM on most of the encryption on the internet". Even if that doesn't make you immediately suspicious that it was set up as a spying operation on purpose (compare "encryption added/removed here" Snowden slide), it makes them a massive state espionage target. Do they really have the ability to resist that level of persistent targeting from every country in the world?