dude... nobody can understand your theory there. guidyy asked to you specifically define "hit the roof", if you can't do that, it can't be true.
Basically, they say they have a truckload of advertisers that pay one cent a click on millions of keywords but they have a high(?) ctr and some good advertiser on specific keywords that pay good but have a lower CTR. They also say the system is optimized to give you the best revenue. Nothing else.
I'm not arguing, I just want to understand. example: 2 sites, same niche, say windshield wipers. 1st site have 8,000 impression a day with 2% CTR = 160 clicks 2nd site have 600,000 impression a day and 1% CTR = 6.000 clicks We suppose they use the same keywords, and more or less same automotive content, ads are same for both sites. Please tell me what's the average, and what make google trigger the low paying ads. I 'm sure I'm missing something .