Many user add their website to promote, but some are not displayed, It is because our website are displayed in frames, so that at the top of the page we can show the bar with a duration.

Unfortunately, some pages because of how they are written cannot be displayed correctly. If we accept such an advertisement, it will be displayed for the users as a blank page.

So, please double check if the page that you want to promote can be displayed in frames, for example, using this service: Check frame killer script