SFS Counter solution allows you to have your own Counter program, which allows webmasters coming to your site to have counter for their own purposes. Registration is free for visitors who are coming to your website. It requires e-mail activation though. When your visitor will become member, he'll get code that he must put on his page. So counter will contain your ads and links. If he want to remove them, he should upgrade his account for a monthly, yearly or lifetime basis (you are selecting price of upgrade plans)