Comment by protimewaster

It's been a pretty common practice for years that musicians will refuse their music being used to promote things they disagree with. E.g., some politician will use a track by a band, the band doesn't like the politician, so they'll tell the politician to stop using the track.

And, I don't think that the agreement here is meant to equate eating meat with being right wing. Moby is famously against animal products, so he's decided he doesn't want the music used to support those products.