I think it's a bizarre situation to put yourself in, "I've made this thing, it's free and open anyone can contribute and make use" then later "actually I need money for food, can you all see your way to contributing something." If your hobby is too time consuming and expensive you need to step away. We don't get pestered to contribute to other hobbies.
the music business in its present form is not working for everyone.
So how exactly does promoting one of the most entrenched bands help the music business work for anyone else?
"A complex system that works is invariably found to have evolved from a simple system that worked." -- John Gall, _Systemantics_