Originally Posted by thommy

they don´t turn off zones - they turn off target=_blank clicks even when it is not an ad.

and this does not only happen for a popunder - it can have a lot of other reasons regarding
ads.

I still can see many ads out there that are not conform with coalition for better ads rules. smaller sites will not be effected but as soon your site gets a topranking in a popular key they will check manually and take action.

there are still ways to use popunders carefully and get them through a re-approval but as I said it is mostly not just one issue when they block a page.