37signals occasionally runs ads on various third-party platforms such as Google. Users who click on one of our ads will be sent to the Basecamp marketing site. Where permissible under law, we may load an ad-company script on their browsers that sets a third-party cookie and sends information to the ad network to enable evaluation of the effectiveness of our ads, e.g., which ad they clicked and which keyword triggered the ad, and whether they performed certain actions such as clicking a button or submitting a form.