I always found the funding of archive.is unknown. Who is behind it and why do they want this info. Why and how they can provide this for free is a big unknown to me.
I'm giving cf the benefit of the doubt against archive. At least I know cloudflare and this would be the first "doubt-moment"...
It's weird that others don't have this issue that much, I would have thought that CDN's would scream from everywhere for years already, if archive.is his statement is "complete".
Edit: cloudflare does not seem to block what's needed though.
> EDNS IP subsets can be used to better geolocate responses for services that use DNS-based load balancing. However, 1.1.1.1 is delivered across Cloudflare’s entire network that today spans 180 cities. We publish the geolocation information of the IPs that we query from. That allows any network with less density than we have to properly return DNS-targeted results.