Was it Hetzner, or was it an attacker hosting on Hetzner/Linode?
It was the German equivalent of the NSA, with the German equivalent of a National Security Letter, sent to Hetzner to force them to intercept this customer's traffic. The same thing happens in the USA.
It was the German equivalent of the NSA, with the German equivalent of a National Security Letter, sent to Hetzner to force them to intercept this customer's traffic. The same thing happens in the USA.