Stamen map tiles no longer available

[mroswell]

https://stamen-tiles-{s}.a.ssl.fastly.net/terrain/{z}/{x}/{y}.{ext} is no longer available.

There is another deprecated url that puts up a comment rendering the map useless.

(that other URL was: "https://tiles.stadiamaps.com/tiles/stamen_terrain/{z}/{x}/{y}{r}.{ext}") and I planned a little pull request....)

But at this point you have to create an account on https://stadiamaps.com/. And even with a free account, you are required to submit a domain name. (I didn't figure out how to use localhost. If I wanted to could probably create a hosts file but that would go beyond the scope of this README.

Is there another source of free, accessible basemaps?

UPDATE:

At the bottom of the onboarding form (where it was asking for my domain name) they had a note

Running into difficulties? Not sure what to do?
Don't panic! Our real human support is here to help.

But when I clicked the Get Help button nothing happened. Sigh. (Could be just a time-of-day issue...) (That was on https://stadiamaps.com/stamen/onboarding/setup-authentication/ )