The LinkTrackr viral bar frames the content of the actual webpage in a way that the source URL is hidden from the user. Instead of seeing the actual URL, the user will see whatever link URL you’ve specified in your account.
However, not all websites allow the cloaking and framing of their content. Therefore, they have in place codes to either break the cloaked page and display the actual page, or to display an error page when you attempt to cloak their pages.
Some of the know websites that do this include Facebook, Aweber, and ClickBank (order pages). In most such cases, the websites would clearly specify that you’re not allowed to frame the content of their pages.
For such websites, we advise you to not use the viral cloaking bar. Instead, just use LinkTrackr to track clicks and visits to the website.