According to ComScore only about 16% of internet users ever click on ads, and half of those clickers account for 85% of all ad clicks (i.e. they're constant ad

According to ComScore only about 16% of internet users ever click on ads, and half of those clickers account for 85% of all ad clicks (i.e. they're constant ad clickers). http://www.comscore.com/Press_Events/Press_Releases/2009/10/comScore_and_Starcom_USA_Release_Updated_Natural_Born_Clickers_Study_Showing_50_Percent_Drop_in_Number_of_U.S._Internet_Users_Who_Click_on_Display_Ads http://www.comscore.com/Press_Events/Press_Releases/2009/10/...