This site provides attestation features: when you do something here that proves you are human, a coupon is placed into your browser. This coupon is later used to identify your ad click as a legit click when you click on a premium clicks advertisement.
In order to get the attestation coupon, you must log into this service (hint: make up a login... in a real system, you would have to purchase a product, interact with a captcha, etc..).