Use case for different IPNS Keys

I’m testing and trying out IPFS/IPNS and wanted to find out a use case for needing/using different keys for IPNS.

You may want to be able to publish to the same IPNS address from different machines, each having its own IPFS node:

Ok, so that helps explain a few things. The next question is “How” publish to the same IPNS key from multiple boxes? Do you copy one key to the other machine or how does that work?

Yes, exactly that: you copy key to nodes that should have publishing rights.

I tested it over HTTP API some time ago: