Given the preceding post describing the hype around ad networks, I thought a closer look at the uber-network might be useful. What I found surprised me.
Google reported $10.6 billion in revenue for 2006. Of this amount, $4.2 billion came from placing ads on non-Google-owned sites. They paid those sites' publishers $3.1 billion in "traffic acquisition costs", resulting in a gross margin from their AdSense ad network business of $1.1 billion.
In 2006, Google spent $1.2 billion on R&D, a little more than $800 million on sales and marketing, and a little less than $800 million on overhead, for total operating expenses of about $2.8 billion.
A simple allocation of this $2.8 billion to Google-as-media-firm versus Google-as-ad-network based on each's contribution to total revenue puts 40% of these operating expenses, or $1.1 billion, onto the latter. The resulting math makes Google's ad network business a break-even proposition in 2006.