I am a long time sufferer of clicks being constantly taken away, which started mid 2013.
I believe everyone is familiar with the click shaving problem that affects certain group of publishers. More and more publishers are getting affected , you will see youe ctr suddenly drop to 0.5% and clicks are constantly being deducted every few minutes.
Here's my experiment:
I made an adword account and created an ad campaign that only allows ad to be displayed my own website's url. I then set up a custom channel in adsense to track that particular ad I created myself.
I then get to a internet cafe and start browsing my website. I clicked on the adsense ad on my website that I created in adword. Stayed on the destination url for a few minutes while checking out different pages.
3 days later when I checked the reports. My adword account was charged yet in adsense it recorded zero clicks ZERO. Meaning Google is taking 100% of the advertiser's fee without giving publisher anything.
So...whats going on?