Blogs 152 million blogs (tracked by Blogpulse_ End 2010.
websites 255 million
(Total sites looking for ad revenue; 400 million
$2.6 billion is the revenue generated by partner sites in third quarter of 2011.
68% of it is the income to partners approximately. It comes out to be $1.768 billion. This means on an average $4.42 are available for each web property for a quarter. It means $1.5 per month. So any author earning $100 has to be on to put in great effort.