While still large, 3rd-party payout was about 20% of Google's revenue ($1.75b total). Here is the breakdown, from their quarterly report (http://investor.google.com/earnings/2011/Q2_google_earnings....):
Total Google revenues: $9.03b Revenues from Google properties: $6.23b Revenues from the AdSense network: $2.48b Google cut of AdSense revenues: $0.73b Payouts to AdSense publishers: $1.75b
While still large, 3rd-party payout was about 20% of Google's revenue ($1.75b total). Here is the breakdown, from their quarterly report (http://investor.google.com/earnings/2011/Q2_google_earnings....):