tinyBuild's stance on this is so backwards it's obvious they DNDTR (Did Not Do The Research).
Games with DRM have their soundtracks pirated online via YouTube, with the uploaders using in-game - nowadays lossless - recordings if there's no official soundtrack. They also seem blind to the fact deluxe-edition soundtracks - even on Steam - are literally a bunch of files that anyone can upload. In other words, DRM-free upon download completion.
Why offer DRM-free builds of a game when people know they'll never be updated for fear of enabling piracy.
Also, they apparently are unaware of the convenience argument. For example, they can just upload their soundtracks to YouTube Music, Spotify, or whatever, so people who would otherwise pirate them can listen for free and tinyBuild would still get money.