That's a bizarre yet original opinion, BMXTRIX, that it "compromises
my ideals" because
I'm not getting paid!

Why the hell would I think
I should get paid? I only listen to their music, I didn't write it! Are you saying I wish
I was whoring it out instead of
them?

But by your logic, you'd better never call anyone
else a sellout or shill- if the innate value of the music is irrelevant, then everything is fair game.
I'm not sure if Zep is still on the charts, and I'm not sure where to look it up. I do know that 'Floyds
DSotM has only spent a couple weeks off the charts since it came out in the early 70's. I think Zep probably still sells very strongly. Where they fall on the sales charts is utterly irrelevant IMO. Setting aside my personal admiration for their music, I think anyone with any musical awareness would cite certain bands as being important and pivotal in the history of popular music. While I don't like all of them, artists like the Beatles, Hendrix, the Stones, the Who, Pink Floyd, Zep, the Doors, Bob Dylan, etc are widely considered by critics to be important and influencial.
At the heart of it, this goes to the issue of respect for art- either you have it or you don't. Whether you feel it shows respect to the music to use it to sell stuff is of course a matter of personal opinion. Just wait til it's someone you really like selling something you don't. How about Jimi Hendrix selling
Tampax? The Rolling Stones selling
Ensure and
Depends. Maybe the Beatles music could be used by George Bush to lead into his TV appearances.
Oh, well. They're not the first to whore it out and they won't be the last. It won't diminish my respect for the music, but it has lessened my respect for the band.