Yesterday was the best day I have ever had with Adsense! I have been running it for about 16 months. For a while I thought I was smart priced because my earning dropped. But, it is now back and better. My guess the drop was due to a decrease in advertising on my key words or some advertisers not wanting to have there ads on my site. Just felt like sharing a positive experience here because there are way too many banned threads.
I have been making money the whole time. The earning just got better this month. I do not want to post that type of information. But, it is more than it was before. I bet it will drop again. It goes up and down month to month. This month just looks like it is going to be the biggest ever.
This should help explain it for you. http://adsense.blogspot.com/2005/10/facts-about-smart-pricing.html
Nothing. I have noticed some months just do better. This month just happens to be the best ever. It goes up and down. I think it has more to do with the competition for advertisers on my key words.