>Jellyfin but doesn't have the obtrusive ads and whatnot that Plex offers

I'm a Plex user who's been thinking about trying Jellyfin out, largely in response to some recent UI changes I dislike but... what Plex ads? I don't have any on my android apps, on Roku installs, or on my parent's SmartTV, and none of my other users have ever mentioned any ads to me. (If I was seeing ads, Jellyfin would become "take some time off work and get it working now".)

I know I've disabled everything except my own libraries, so it's possible there's a setting somewhere that allows them, but if so, I disabled it so long ago I honestly don't remember ever seeing any. Are other Plex users seeing ads? Was it after a recent update that I may have skipped, maybe?