Supported links with Replug
If you are getting an error while shortening a link with your call-to-action "iFrame is not allowed for your mentioned URL, please try adding a URL which allows the iFrame." The website that you are trying to shorten does not allow the iframe option and in that case, the link will not be shortened. Nearly 1-3% of the most popular websites do not allow the iframe embed option.
For the websites which do not allow the iframe embed option, you can create a Campaign with the URL Shortener or Retargeting Pixel. That way, your links will be shortened regardless of the website allows the iframe embed.
In a near future, we will be adding an option for the Fallback Campaign, using that you can select the Campaign which is of type Shortener or Retargeting Pixel.