Has Google AdSense disabled third party Click Trackers

Some AdSense account holders use third party click trackers to track clicks to see suspicious activities so that they have information to report by using the "Invalid clicks contact form" to protect their account from sabotage, a link to which you can find near the bottom of this post: How to contact AdSense Help (click BACK button to get back to this page. Some also uses such click trackers to track the performance of their ads, especially those using arbitrage accounts. Well, if you believe this site (which refers to messages in WebmasterWorld, a subscription forum I believe) Google AdSense disabled third party click trackers, these tracker programs will no longer work.