> they are simply not a stable foundation to build on.

They're a budget host, you should always proceed with caution and never rely on for production. It's the same as buying a second hand eBay server to host users upon. I learnt that the hard way.

> Hetzner, the ball is in your court.

Not really. If you read the T&C, you'll find that they can do anything with the server.

From their T&C:

2.7. Furthermore, we reserve the right to terminate the contractual relationship without notice for good cause.

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Any server with any company can do the same. There's been numerous stories of Amazon has doing the same. Same with Google.

Unless it's colocation or where you own the hardware you can be screwed in many ways.

I would never trust a dedicated server host.