Most pay per click networks have different measures in hand to protect website owners against click frauds. Other search engines can track more than 50 data points, IP address, browser’s information, user’s session info and pattern recognition. They also have “systems” available that detects fraud.

Not to mention the specialized teams monitoring ppc affiliate programs and how things are going and helping advertisers stop click frauds.Google offers suggestion on how to avoid click fraud. Using “negative keywords” can be used to keep your Adsense showing on products and services that are in no way related to yours. Adding tracking URLs to your links so you can track the traffic coming from Google.