Possible explanation for dropping CTR

...all your regulars have seen all the ads...

[dmorison]

I'm probably well off-base here, but I can't help thinking that a drop in CTR could be explained by there not being sufficient advertisers on the subject matter of a publishers website.

For my target keywords there are only 10-15 active advertisers on AdWords; so any publisher joining AdSense with a portal on our subject matter is going to exhaust well targeted ads very quickly.

I think you need a very busy site with many new visitors daily to make it work.

Make sense?

[valortrade]

I have a feeling that some advertisers with high CPC campaigns had pulled out Adsense program because after 40 days, they had not seen the expected ROI (conversion rate).

On the other hand, they are tracking the traffic flow and found more and more "targeted/optimized sites".

I do not think that Google has lowered the payout rate yet. If that would happen sometime, we could see much lower revenue.

[ap_Rhys]

I have a feeling that some advertisers with high CPC campaigns had pulled out Adsense program because after 40 days, they had not seen the expected ROI (conversion rate).

Most Adwords advertisers know nothing about Adsense. They have their budgets, their campaign timings, their own agenda.

I think you have picked up some nonsense from a spammer on another thread and you are running with it.

[valortrade]

Most Adwords advertisers know nothing about Adsense.

Are you kidding me?

Anyway, I would feel lucky if you would be the "Adwords advertiser" that knows nothing about Adsense!