I'm not so sure about this, their description specifically calls out one-time-only costs like domain registrations as being the only things excluded. Cautiously optimistic in addition to the recent reappearance of new GPU models being offered to existing customers, Hetzner may be prepping an hourly-billed bare metal GPU product at a great price

Hetzner bare metal already deploys in a couple of minutes when renting existing hardware, and there is plenty of precedent for hourly-billed bare metal services around. I think they're intending to move all their bare metal over to hourly billing.