Obviously the 24 hour minimum means you’d be better buying one for most CI uses, which I think is what most people want them for.
However I think I remember a image can that also manipulated used apple hardware for the metal api? They would still benefit from the ability to scale on at least a daily level.
https://twitter.com/WindexCowboy/status/1333876188385841158
> The use of the Dedicated Hosts concept keeps the license requirement decoupled from the instance life cycle. While you do need to allocate the Mac for a minimum of 24 hours, you can launch and terminate a fresh mac1.metal instance on that box as many times as you like.
See https://news.ycombinator.com/item?id=25562532 for a huge caveat: scrubbing the old instance takes anywhere from 30 minutes to 4 hours.
So there are time constraints that make this far from ideal.