My friend Cloe’s answer to the question “Would you buy a hidden track on an online music site?”
Musicians, listen up! With very limited exceptions, hidden tracks should only be available on physical media. The digital equivalent of hidden tracks is free tracks available for download on your website. If you do have hidden tracks, listing your track list as tracks 1, 2, 3, 4, 5, 7, 8, 9 makes it clear that you either have a hidden track (in which case it’s NOT hidden) OR you can’t count – either way you look stupid!