I have doubled my # of unique visitors in the last 15 days, and my clicks have decreased by 1/2...wtf??? I also noticed some misplaced ads on my site.
I dunno but something is going on, 95% of my income was from 12am to about 6 am. Than it has just basically died after that.
per click rates have dropped about 30% for me this month, while maintaining same level of traffic/CTR and staying with same ad categories.