> And if you're getting a turnstile challenge it's unclear how it's different than an anubis challenge.
You are guaranteed to pass an Anubis challenge eventually [0], whereas it's possible to get stuck forever in an infinitely-looping Turnstile challenge.
> If you're outright blocked, it's probably a site decision (eg. block all VPNs or block everyone not from a given country) rather than cloudflare's.
Cloudflare blocks legitimate users itself sometimes [1].
[0]: Unless you run into a bug, but Anubis is open source, so you can always submit a patch upstream. I've done this myself, and I can confirm that it's relatively straightforward.
>You are guaranteed to pass an Anubis challenge eventually [0]
That's a double edged sword because bots will eventually get through too, and unlike humans, their time is dirt cheap.
>Cloudflare blocks legitimate users itself sometimes [1].
I never ran into this issue despite using seemingly maximally suspicious configs like tor browser. I can't say the same for some other vendors.