I've noticed something interesting in what seems to be the recommended way to show iads in some apps.
In the Apple NavigationBanner example ads are downloaded by the AppDelegate but (according to my reading) are only displayed when the user clicks something in the table and a TextViewController is put on screen.
I'm using this exact behaviour in my app but it occurs to me this could be bad, loading but never showing could cause payouts for ads that were never displayed. I wouldn't want to accidentally fall foul of the rules.
Am I right to be worried about this? Or are Apple perhaps using some unknown mechanism to track what ads have been put on screen instead of simply downloaded to calculate their impression count?
Thanks.