You obviously expect to pay over the odds for cloud VMs, but that's really expensive. I would have thought someone as big as AWS would have been able to negotia

You obviously expect to pay over the odds for cloud VMs, but that's really expensive. I would have thought someone as big as AWS would have been able to negotiate more favourable terms, but it seems not. Given I'd expect a lot of these to be used as iOS build servers, it's worth noting that Azure DevOps gives you 1,800 build minutes on the free tier, which AFAIK you can use with their MacOS agents.