Yes, it's been our CEO Avery's position for ~6.5 years now that we should run DERP servers on the internet for the public good. (rate-limited)

But these are a separate fleet (https://tailcat.dev/derpmap.json) separate from our usual ones, and not using "tailscale.com" in DNS or SNI anywhere.

Repo suggests that they're running their own (rate-limited) DERP servers.

edit:

Which are probably tailscale's, as it's under tailscale/ github org?