Pringle said:
Not necessarily defending him, but ultimately, these guys perform to be heard. In his 50s, Mellencamp doesn't want to become a tree falling in the forest.
It took some ethical gymnastics, but I guess he's hoping that the commercial leads people to the album and in turn can turn people onto his music and his thoughts. Greater good served, in his mind.
If he wants to turn people on to the music, make it good enough where it will get some high critical praise in advance of the release. Do the late-night TV circuit (Leno, Letterman, O'Brien, Kimmel, and/or SNL, etc.), do the Today Show or GMA and make 2 of the 3 songs you play off the new album. Make the new stuff kill in concert where people will tell their friends how good the new album is. But don't sell out and make your song associated with a product just so more people can hear it.