Has anyone seen this on their accounts? I've had very steady traffic to my main blog for about 3 months and my CTR has likewise been very steady at 2%. In those 3 months, I've probably had 3+% CTR only a handful of times. My average CPC was also $0.40. However for the past 1-2 weeks I've seen an incredibly high CTR, consistently ranging from 3-8%, while my CPC has decreased... so in the end I'm making the same pretty much, but I have no idea what this drastic change could be attributed to.