[ezfe]

This article says 80% of known websites, which are 19% of all websites. Probably where it came from.

https://w3techs.com/technologies/details/cn-cloudflare

[paxys]

That's still the number of websites, not their traffic. A personal blog hosted on Cloudflare and google.com are not both the same.

[Aachen]

Probably that just skews it worse though. Most people aren't cf customers but many of the big targets seek protection