Is there a relationship between the 2? What if traffic comes from email list? will adsense earnings lower down?
You are most safe with organic traffic but it wont affect the CPC, yes i would say its defined by the advertisers, or possibly at times the types of places where the ads end up being shown.
I dont know for sure if this would be the case but say if there were medium to high paying keywords and they were mostly being placed by webmasters on poor quality blogs with the click throughs to the advertisers sites never convert for them, then maybe the advertisers would complain about this or be willing to pay so much per click or both. Or maybe still willing to pay as much as they do per click but somehow google arrange for the publisher not to benefit as much from this because of the poor quality site that the publisher could be using. Its a scenario only and i have no idea if it would go that way.
definitely not. Earning per click is related to the keyword/niche you used. It is also subject to smart pricing of Google.
i would say they are not directly related but inderectly it will impact on your earnings. organic traffic is visitors that are searching for something and landed on your site, therefore information your site has is something ornanic visitors are looking for. and since your site is of an interest to the organic visitor, they are more likely to click on your ads which are related. on the other hand, all the traffic you get from email marketing might not be interested in your site therefore will leave without clicking on your ads.
I'm agree with that.. they have relation... organic traffic is more relevant and easy index by search engine..
Yes, I think it effects the price you get per click, bigtime! Clicks I buy from SEM are only worth about HALF of what clicks I get from google search organically (SEO).