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I don't click on such ads. I think its a spam, and I don't anyone who clicks on them. How do they generate such good revenue?
CPC : Cost Per Click
PPC : Pay per click 1000 impression garented by Yahoo google and so on...!
CPC is Normal....!
But If it is Pay per click which you find Are dynamic ..Dont worry click it you are doing a faver to some one .............But see it should not be a spam...... It should link back to related Subjects looking for.!
All are not like you Ali. If we look at the overall search engines click through rate, it is between1 and2%. Display CTR is even less than0.50%. They are making money just because we are dependent on them to find anything on the web. If they are making such huge revenue at such low CTR, just imagine how much they make if CTR goes higher like10% :)
The charge on every keyword clicked to customers, imagine the no.of keyword and some keywords go up to $55+ per click.
They serve ralevant ads to right person if you are not getting ralevant ads then there is mute button on right top of ad unit you can use that one
BTW most of there advertisers and Income came from North America and West Europe and probably at that part peoples are seeing more ralevant and better ads that why they click more.