I agree that they could have a strategic bidding advantage by looking at the details of other advertisers' campaigns. I disagree with #2. If Google puts their

I agree that they could have a strategic bidding advantage by looking at the details of other advertisers' campaigns. I disagree with #2. If Google puts their ad above groupon's ad, and they get the click instead of groupon, then they forego the revenue. If they out bid for display ads, then they also forego the revenue.