There are lots of other options. While they may not all be "cloud" providers, there is a wealth of VPS and dedicated server providers in almost all countries you can name.

I have no idea why you are picking on Hetzner in particular. They offer clearly defined bandwidth packages with their servers (20-50 TB) and charge for overages (0.2 cents per GB).

Hetzner is perhaps not what you would call a premium provider, but their prices are about in line with industry wholesale rates. For example a very high quality provider that competes with Hetzner in their home market charge 0.4 cents per GB and they are happy to deliver any traffic you can serve at that price point.