Hacker News Reader

You can indeed get S390X VMs from IBM cloud, either running z/OS or Linux:

Open Source maintainers can ask for

a) ssh access to s390x VM

b) web console access where it's possible to create and remove VMs, for example 2 VMs, 8 GB RAM per VM

With some distro like RHEL, SUSE, Ubuntu. One mainframe runs very many VMs. All access is monitored.

Is this the LinuxONE Community Cloud, or a different resource?

Yes, this is LinuxONE Community Cloud.

If you have an enterprise deal I think you can.