all click through advertisers are scams
... well in my experience at least.
In at least half of my web site projects i have been tasked with making a click tracking system as stats don't tally up with the charges being claimed.
.. seems to be there needs to be a way to prove the click throughs... in Broadcast (like TV) the broadcaster has to show logs to the advertiser to prove an advert was shown at a given time.
The problem with the web is that the people who rely on click throughs, small sites cannot afford to push google and facebook too far, otherwise they will go broke.
p.s. @AC4 :10.42 - thats fine, but the web will cease to be paid for without advertising so expect a lot less content, bandwidth etc.