What a wonderfully awful time it is to be in the radio business -- a business so bad that disruptors are being disrupted at an astounding pace.

Consider Pandora Media (P), the streaming radio service whose raison d'etre is to introduce you music you might like. The stock briefly fell 15% this week after reporting disappointing guidance. My Motley Fool Rule Breakers teammate Rick Munarriz did the math and found that far too few are paying for a Pandora subscription.

Why are we surprised by this? Pandora isn't dealing in original programming the way that Sirius XM Radio (SIRI 0.98%) is. Meanwhile, on-demand audio is also better than it's ever been thanks to podcasts. Find out more about how and why this format is gaining popularity in the video below.