Here's a comment about it I made a few weeks back in the context of why Jellyfin came to be and why I only ever recommend Plex or Jellyfin

This is going to go back quite a ways, and much of my knowledge is old at this point so some details might be off.

~15 years ago Plex as we know it started out as an OSX fork of the 0G Xbox homebrew software XBMC (Later renamed Kodi (For those who don't know, XBMC was XBox Media Center and would turn the 0g Xbox into the cheapest Home Theater PC you could get at the time, man those were the days lol))

Plex was only briefly open source and then was quickly closed when they incorporated a year or so after they had something functional. They never made any promises about not charging or being open source or anything, so that's why I'm generally fine with Plex

Sometime around 2012ish Emby came along as THE open source alternative to Plex and things were good. MOST of it was supposed to stay open source as was promised. From the beginning they kept build scripts n such closed source, probably should have caught on them, but heh ya know hindsight and all that.

Then around 2014/5 they took it all closed source, relicensed it and introduced their paywall including locking away already existing features. This is what pissed me and many others off and this is when and why Jellyfin split off promising to be truly fully open source forever. (There was a ton of drama about it at the time, but it looks like Embys Q&A thing a bit back doesn't even bother to mention it, imagine that lol)

I don't have a problem with subscriptions on open source software myself, but the way they went about it...yea. fuck em