Hello Tom,
Thanks for your question. In the premium version of theme, you can set the post or Add Image there but it is not possible to add the Ad Code there. It need customization of theme.
In case of No Image available, please don’t forget to add the featured image on every post. Otherwise, default No Image will appear there. http://www.acmethemes.com/blog/2016/04/set-featured-image-on-post/
Best Regards,
Acme Supports