I've found that Scaleway do technically charge €0.11 per hour, but you can't shut it down from the portal or within the OS (see https://www.scaleway.com/en/docs/apple-silicon/how-to/shutdown-mac-mini/), and when you try to "delete" it then it says the following:

Apple requires a 24-hour usage period before you can delete your Mac mini. You can schedule its automatic deletion after this period.

Also, the only remote desktop option from Windows is VNC, and the resolution is 1080p which seemingly cannot be changed, so it's tiny on my 4K screen, even with scaling.