From the big NYT profile of My Morning Jacket in Sunday’s paper:

[…W]hile many acts have turned to Madison Avenue for ancillary income, My Morning Jacket has remained ambivalent about using its music for advertising. Four years ago its song “Mahgeetah” was used in a beer commercial, but the group says that it gave away some of its earnings to charity and hasn’t done a commercial deal since. Its manager, Mike Martinovich, said the band has not ruled out these opportunities but that they conflict with a wish to hold onto a sense of mystery in its music.

“When you license a song to a commercial,” Mr. Martinovich said, “you run the risk of limiting the meanings the song can have to your audience. If an artist wants to preserve a listener’s ability to have a personal interpretation of a lyric, he may have to forgo the financial gain associated with a commercial license.”