Cloudflared services like ani.social are getting a “100%” available stat. That site may be up but it’s unavailable (denying availability) to something like ~1-3% of the population 100% of the time. So in principle it should never be able to achieve the 100% availability stat.
I understand it would be quite difficult to calculate an availability figure that accounts for access restrictions to marginalized groups, because apart from Cloudflare you would not have a practical way of knowing how firewalls are configured. But one thing you could (and should) do is mark the known walled gardens in some way. E.g. put a “🌩” next to Cloudflare sites and warn people that they are not open access sites.
The lestat.org availability listing is like a competition that actually gives a perception advantage to services that exclude people, thus rewarding them for compromising availability. I would also subtract off ~2% for all CF sites as a general rule simply because you know it’s not 100% available to everyone. They do not deserve that 100% trophy, nor is it accurate.