They don't use non-standard records; if your resolver protects your privacy by not sending them your IP, they will intentionally return bad records specifically to fuck with you.

This is the correct comment, they purposefully block Cloudflare traffic due to them not forwarding user data.

They stated they need it to stay in line with the law but they can do that with things like the user's IP. To go that far to insist on getting a specific type of user data is sketchy.

They do quite a bit worse on top of that, ctrl-f pixel.archive.is in view source when you visit any archived page.

It's odd that every other website I've ever tried works with Cloudflare, but not archive.is. Does anyone have an idea what's so special about them?

archive.is _intentionally_ is blocking Cloudflare for not letting them track users.

See https://news.ycombinator.com/item?id=21308564 and https://news.ycombinator.com/item?id=23316085

I use Googles dns 8.8.8.8, so this must be something else.

Google may have issues too, I don't know. It's a DNS problem that has existed for a while.