Lemmy’s two main developers are communists so it’s a “platform built by Communists” just like @Cowbee@lemmy.ml said.

Spaces have nothing to do with Discord. They’re just a way of grouping multiple Matrix rooms together into one “space” like how Discord channels are grouped into one “server.”

It’s an unofficial open-source daemon used by alternative Spotify clients. I used it once for a terminal Spotify client. It’s a pretty neat piece of software.