Well, I would think it's safe to assume that most people who have Google Chrome are trailblazers in the online world and probably don't click on a lot of ads and make them money anyway. Also, looking at the browser statistics (http://en.wikipedia.org/wiki/Usage_share_of_web_browsers) Google Chrome is just about 0.74% of the browser market.
Right now it's important for them to get Chrome on more computers. It will be interesting to see if this strategy changes when Chrome starts getting more traction.
Right now it's important for them to get Chrome on more computers. It will be interesting to see if this strategy changes when Chrome starts getting more traction.