Traditionally, bands playing covers of songs written by other bands had to pay a royalty to music publisher organizations like ASCAP and BMI. The irony is that under traditional recording contracts, bands didn't make much from album sales, but touring and (to a lesser degree) publishing rights. So toeing the record industry party line on illegal file sharing, while giving in to the abuse of the band's publishing and public performance rights, actually makes the least economic sense for musicians in terms of the old music business.