It is estimated that more then 20% of the clicks that follow an AdSense pay per click consultant and marketing link are just done in order to get money from the person paying for the ad. Some people believe the number of fraudulent clicks to be even twice as large.There are a great deal more schemes involving click fraud, such as groups of AdSense publishers clicking each other's links (which is referred to as "clicking rings", or spamming people so that they click such links.