As long as the part asking for ID trusts the part verifying the ID, there is no need for anonymity to be broken, since the verifier just has to confirm what the asking part needs to know.
Think of it like someone owns a bar and needs to know if a patron is old enough to drink, and the bar owners brother or best friend says "I know that guy, he is old enough".
Their commercial clients are doing things that give IPs bad reputation or banned from services, so they use this service to get access to home IPs to use.
It could be something as simple as "oops, someone downloaded a file they shouldn't have, and now all the systems of the power grid in a quarter of the country has been encrypted by ransomware"
Should be noted that in Norway it is not just for war, but rather any emergency like natural disasters or someone takes out critical infrastructure in a digital attack etc.
When I registered an account , I made sure to do so with an instance whose TLD is connected to something that should be around for a couple of billion years more.
Ps/2 keyboards used interrupt when transferring data, meaning instead of waiting for the cpu to get the data it is trying to send when it is free, it will just interrupt what the cpu is currently doing and tell it to process what the keyboard is sending.
Ip address isn't tied to the house, but the subscriber.
But most ISP don't have static Ip for private customers, so you experience just suddenly being banned because you received an Ip address someone got banned.
Just signed up for Tuta and they do not ask for this.