They should have open sourced from the start, then such a drama would never have happened. But if you start propietary, become very popular and then open-source

They should have open sourced from the start, then such a drama would never have happened. But if you start propietary, become very popular and then open-source, you really have to be careful with what you open-source. It's just how copyright law works. And we can't just ignore the copyright law in just this one case because it's Winamp, unfortunately.