I think the concert model is incomplete. There is the associated fandom stuff as well. I've been calling it the web-comic model but it's been around longer than that in various bits and pieces. Give away the culture. Build fans, loyalty, credibility, and goodwill. Sell stuff. By 'stuff' I mean real physical goods. The kind you can't DRM, the kind that require limited resources. T-shirts, album art, custom concert posters, limited edition signed cover art, etc. Mugs, hats, pens. Things from cheap memento to collector items (e.g. Used guitar picks, drumsticks from concerts, just signed versions of same) and everything in between.
Fans like to give their heroes money. But people are still people and like to feel they're getting something out of it. A music track no longer really qualifies as that something (if it ever did on it's own). But various bits of 'stuff' would work fine. Heck invest in a 3D printer and start knocking out one offs or limited edition bits and pieces.
Culture is what people do, who they are; you can't charge people for access to it forever. What you can do is make a living from providing access if you do it in a reasonable way. Provide value for money.
