Not really, all these shenanigans occur in a nested series of iframes. The original webpage that served up the initial ad iframe can't see down into these. Wh

Not really, all these shenanigans occur in a nested series of iframes. The original webpage that served up the initial ad iframe can't see down into these. Whatever supply partner the webpage is using doesn't want to shed light of this to the publisher or else that supply partner may be replaced. This issue is illuminated to some degree by 3rd party ad analytics companies that monitor this via crawlers and user panels. This problem is also attacked from the advertiser side that will use 'viewability' providers to ensure their ad is, well, viewed.