CNBC is re-airing a documentary on this business, which it calls "the $150 billion industry hiding in plain sight." Catch it Sunday, April 26th at 10PM.
From the press release:
"In this one-hour special, [Darren] Rovell will speak to the pitch people and the inventors and executives who produced the greatest products. He'll also show viewers how the infomercial world works and explore various products and their claims."