That's an interesting idea. Kind of like how you can pay Ebay to give your posting a yellow background, making it more noticeable.
There's something slightly icky about charging my users for visibility though. Who I consider "starving artists" (even though plenty are probably doing fine...). There's something nice about Fandalism currently being a level playing field for everyone.
By the way, Fandalism uses a version of the Hacker News algorithm to determine which posts get featured.
That all makes sense. It may not work in this case, but in general I like businesses where the customer is clear. I tend to think there's always a tension when the user, the musicians, aren't also the customer, guitar companies for example. Obviously a hurdle that has been overcome countless times before.