Wall Street Journal and USA Today Best Seller Human knowledge once doubled every thousand years .
Your attention-even for a few seconds-translates into cold, hard cash they\'re willing to manipulate and even hac.
In this digital landscape, they keep score with eyeballs and eardrums.
No wonder we can\'t keep up Welcome to the Attention Economy-where you are the product.
Today, it\'s every twelve hours .
Wall Street Journal and USA Today Best Seller Human knowledge once doubled every thousand years