Country singer Garth Brooks has similar qualms with individual song downloads. Brooks has reportedly met with Apple on multiple occasions to refute the policy.

"They truly think that they're saving music," the singer said in a 2009 USA Today report. "I looked at them right across the table with all the love in the world and told them they were killing it. Until we get variable pricing, until we get album-only downloads, then they are not a true retailer for my stuff, and you won't see my stuff on there."

Multiple sources said that with meandering anthems that overlap into one another, ambient rock band Tool has the same misgivings about iTunes.

But Kid Rock's reservations represent another faction. Rather than a philosophical disagreement, the artist believes that the royalties Apple rewards to artists are too low. He told the BBC in 2008 that "iTunes takes the money, the record company takes the money, and they don't give it to the artist."