One of new advertisements makes problems. It redirects to adf.ly URL shortener, which jumps out of Visitbit frame with JavaScript. Then it goes to the shortened address, but Visitbit does not pay for the site, what is worse Visitbit keeps serving this advertisement again and again, so one cannot skip it. I would say such malicious advertisements should be rejected. Seems that adf.ly redirection is a kind of rotator and redirects to some scams like "enter your phone number to download a file", which in fact subscribe to premium SMS services.