Services all over the world pay for 'unique' clicks on advertisement banners. To make sure for them that one does not earn money by clicking 1000x on his own, they store every IP used. This address cannot be changed, so it's a good protection to prevent cheating. WebClicker uses public available proxies to load and click ad banners by emulating the complete HTTP browser transfer. Advertisement systems will recognize every proxy as a single unique user clicking on your banner and thus increase the user payment. Server administrators have to be aware of this heavy security hole, as customers may use this program to earn hundreds of dollar a month.