The source wasn't open though, it was available, and it was provided in a sense that fully showcased that they did not understand what they were doing. Everything from licenses that were fully unenforceable and non-compliant with Github's license agreement to illegally distributing proprietary code to fundamentally misunderstanding how to use git.

It's one thing to provide a source available codebase. That's a choice, and it's fine for various definitions of fine. What they did was legally put themselves in hot water with the inclusion of proprietary dependencies, misrepresent what their intentions were, and likely irrevocably damage their reputation to a small, but vocal minority, who likely have a sizeable overlap with folks that know what Winamp is/was.

It's okay if none of that matters to you, or if it doesn't resonate with you, but the things that were done were comically awful in terms of sharing a codebase.