I have a dedicated machine with Hetzner, and AFAIK they charge me the full amount regardless of whether it's on or off. If I cancel on day 3 of the month, it makes sense to be charged for only those days' hours. However that's different to "turn it on for 6 hours" kind of hourly pricing.
https://www.hetzner.com/dedicated-rootserver/matrix-gpu/
But, as far as I know (hence the sibling question), you still need to pay the setup fee each time you launch.
> Cancellation period: 30 days to the end of the month
To me that indicates it's not possible to order the server for only a few hours.
Either way... it's a mess. They added hourly billing for dedicated servers six months ago, there's not much excuse for still having contradictory information hanging around.
