I get so many unwanted and crappy email solicitations.  I have begun to research this 'click' concept.  found the following excerpt on a GOOGLE search.   “Affiliate Fraud”

This type of click fraud is more difficult to detect and manage.

Many websites are hosting paid advertising somewhere on their pages. These ads usually relate to the topic of the page and are delivered by the PPC marketing network based on keywords found on the page. Every time one of these ads is clicked, the network bills the advertiser and gives as much as 50% to the owner of the site the click came from.

The potential to scam this sort of system are obvious.  By exploiting fake IP addresses, using algorithms to determine click behaviours and finding ways to destroy identifying references, a fraudster can operate for months or even years without getting detected. If done properly, it can be next to impossible for even the major PPC marketing networks to detect.

http://www.netcommercesolutions.co.uk/articles/Pay_per_Click_Fraud.html

Next those pesky 'fake' or out of area phone calls.