GitHub also generously gives me a bunch of free CI, in exchange for whatever they benefit from me being there.

It's worth $50 just this month, according to them, but I don't see anyone else offering the mac runners that account for most of it.

For all the complaints, I test my packages that actually need it across dozens of architecture and OS combinations with a mix of runners, nested virtualization and qemu binfmt, all on their free platform.