Just wanted you to know there is no need to tinker with code any more. A Pro user is now able to turn on a toggle and implement an ad unit below the headline.
* From your Paper Settings Dashboard, click Layout & appearance, then Ad units.
* Customize which ad positions you would like to show by clicking on the ad position to view the ad position toggle. Switch toggle to ON or OFF position to view or not view ad. There is now a "leaderboard" or banner ad as well.