Labels are stupid. The music is just sitting there. Why not allow RBN authors to work with it? The fans are happy, and even if it doesn't make a lot of money, at least it'll make some. Heck, even if it makes no money, at least the music is getting out there (with the potential of introducing it to a future lifelong fan who is willing to give the label all of their monies).
Yes, labels are often stupid, but it's not entirely accurate to say "the music is just sitting there." Remember, studio masters have to be found, then digitized (if they aren't already), then massaged into something that sounds more-or-less like the finished product while being played through four or more different audio tracks. Of course the RBN authors are willing to do most if not all the work once the masters are found, but even tracking down the masters can be too much of an effort to be worth the return. And if the masters are available, not every artist or label is willing to simply turn them over to somebody with whom they haven't yet built a trusting relationship. So that's more work the label has to do, and less of a chance they'll see a return on that investment.
It sucks, but it's reality.
It's all right. Everything will work out fine.
It's all right. We're going to the end of the line!