Sometimes the real value of a project isn't its proposed worth, but the schadenfreude it offers instead. I've backed a few failed Kickstarters that I absolutely got my money's worth on.
On top of that, when told about the proprietary code, they deleted it from the repository thinking that was just the end if it. So they didn't have any idea how git works either.
Winamp source code was published on github, but the license said you can’t fork or share the code. Such a license isn’t compatible with github, which is all about forking and sharing.