If there are no clickthrough URLs set up in Flexitive before you export your design, Flexitive will either add a placeholder clickthrough URL for the background or not apply a clickthrough at all, depending on which ad server you are exporting for.

In the cases where no clickthrough URL is applied at all on export, no click event will occur if you locally test the design. You will still be able to set the clickthrough URL in your Ad Server after you upload the file.