Their latest earnings release - http://investor.google.com/earnings/2010/Q3_google_earnings.html - shows their Traffic Acquisition Costs (TAC) @ $1.81B for the quarter.
What type of traffic is that? Is that the cut they give Adsense partners? Or is that the various deals they cut with a variety of third parties (e.g. Firefox search bar, and desktop manufacturers, etc.)?
Or is there something else I am missing?
I know that startups usually have TACs, which many times consists largely of dollars flowing to Adsense. So just trying to wrap my head around what type of TAC Google could have.
Thoughts?
"The majority of TAC is related to amounts ultimately paid to our AdSense partners, which totaled $1.52 billion in the third quarter of 2010. TAC also includes amounts ultimately paid to certain distribution partners and others who direct traffic to our website..."
So, primarily adsense but also likely includes the other methods of distribution you referenced.