I have been observing the issue form last 3 months. For one of my major client, who has got many websites for adsense, and sites are really improving for the ranklings and the unique traffic form the engines, plus Gads impressions are also increasing in the adsense account, but the Cpm of the website is getting reduced every month.
I have heared something that when your account reach 5 figure monthly earning, it goes on manual checkcing and then they put some smart pricing tag there where they share the less revenue with the publisher.
i have test quality of the traffic, keyword and the ranking, but nothing improved in adsense earning.
should we split account. We have over 2M ads impressions in the gads account...
pls suggest......