I can confirm it still works as intended.

@Cup Of Red Tea:
Give it some time. They don't arrive immediately. Theoretically it might be bugged due to one of the recent updates. I can check that just in case.

Ye so how do I get people to spawn? I zoned the residential and made sure roads are connected, houses got built but they're empty...

I did finally update the moon map by the way.

I can consider that. At the time, I thought that players might want to have them. And I wasn't so sure if a city would be viable. But it turns out that you really don't need outside connections.

This is really cool. Any chance you could also update the Moon Challenge to have no outside connections? They're kind of an eyesore after seeing it done without any on this map.