Yglesias again:

This is my current understanding of the dilemma. Optimal allocation of LCD Soundsystem tickets requires demand-responsive ticket pricing. But good rock bands are not composed of narrow-minded amoral profit-maximizers. Consequently, they're motivated to price tickets at a lower level than the market will bear leading, in turn, to middlemen getting the rents. What's needed is a way for bands to price tickets at demand-responsive levels in a way that's consistent with the norm that the guys in a cool band shouldn't be narrow-minded profit-maximizers. The best solution here, I think, is charity.

Update: Atrios says "Just play more shows.", which is what the band is actually doing.