IME Hetzner's not unreliable. I don't think you could serve 100k requests per second on a single VPS though. (And with dedicated, you're on the hook for redundancy yourself, same as any dedicated.)
They’re unreliable as soon as you have to deal with their support who have the technical knowledge of a brick.
And as soon as you have to do ant business / deal with the german side of the business expect everything to slow down to 2 weeks for response which will still be incorrect.
They are simply not worth the hassle. Go with a competent host.
Ideally, we'd all be using very good and competent hosting companies, but they're not ideal for free/low revenue projects. It's better to have some down time than having to shut down the service because you can't afford to keep it running.
I think that in both cases here (OpenFreeMap and wplace), Hetzner/OVH/Scaleway is the way to go. Depending on what we're doing, the cost savings can even allow us to have redundancy at another cheap provider just in case something goes wrong.
clearly not true because I ran an ipfs daemon before and didn't get any nasty letters.
I got nasty letters during the letterbombing attack on Tor relays. They were nasty letters forwarded by Hetzner from the people who actually wrote them. Pointing Hetzner to the page about the attack made them go away.
I don’t think I’ve ever migrated anywhere and not kep the previous thing running for a month unless I wasn’t worried about exactly that thing happening (to be fair, not prod traffic blackhole, but similar effect)