Spotifyd is a Spotify daemon, not an user application. It makes perfect sense to run as a service. Though personally I would run it as a user service instead of a system service.

It sounds insane to me they would use a suite where they have no control over its state… Can’t they at least block the updates? Just imagine you’re a student and your success depends on the incompetence of others

So a fairphone? Though it doesn’t provide wireless charging I think.

You can easily request a free domain through services like duckdns.org. Might not be the prettiest domain name, but for these purposes it’s fine.