It took a lot of work to get this add-on almost working on our test forum. We tried to do it ourselves and it would only partially work, serving only 2 dfp ads into each page. When Audentio support finally responded to our cry's for help (and this took a long time and a dispute filed with paypal), they managed to get it to work with 3 dfp ads, and I thought it was fixed... But sadly that is the maximum number of ads we could ever run per page with this Add-on.
After two weeks of testing it with the 3 DFP ads on our test forum serving test ads (simple image ads we created for the purpose), it failed entirely and stopped serving ads completely into our pages.
This add-on creates DFP code dynamically and I suspect this is where the problem is, but i am just worn out from trying to get this add-on to work as it is described, and to work RELIABLY, which is the most import part of forum monetization.
You can't count on this Ad Monteize Pro Add-on to do what it is promised to do.
Also, I am not really sure how Google views programming that creates DFP code on the fly like that, and perhaps that is another reason why it might have stopped working - perhaps the DFP network blocked the ad tags being created by this Add-on... As a DFP user for over a decade I wouldn't be surprised.
Fundamentally, trying to get this AD Monetize Pro Add-On to work was an expensive lesson in time and money for us. As Audentio was reluctant to refund us our money when we found it wasn't working right from the outset, and probably won't now, I suggest you be very careful if you are considering the purchase of this Add-on. This Add-on is expensive and did not work. We uninstalled it. We'd like a refund of the purchase price.
We should have stuck to doing the responsive DFP code ourselves, which we did, was free, and took us all of 15 minutes to do successfully.
Alex