So for this project, our current plan for a way to try to make it profitable is to sell new skins for the characters the player controls. As it is, each moves about with it's own simple music loop, which changes depending on game events.
What we'd like to do is sell new skins that have their own music loop that corresponds to their appearance. For example, our first "experimental edition" is a blue-brothers looking guy that has a simple bluesy loop.
What I think would be neat is to have other artists contribute their own skin, following a template and general style, and tying some music loop to that. Of course some percentage of profit and credit for said skin sold would go towards said contributor.
We still need to experiment more with Cocoon's store (if you have experience with this, I'm all ears) before we know if it's even at all viable, but let me know if this would be something you're interested in.