The 10x of revenue increase projection in five years is potentially due to the fact cable subscribership increased 2x in those 5 years, several more cable-only channels that came out, and the market for cable advertising became more proven thus the perceived value of each ad increased. It doesn't require there to be considerably more ads shown per hour of television. Your article isn't exactly strongly supporting your claims as well as you might think it does.

But I do agree, over the years there has been more advertisements per hour of television.