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@Lame_Wolf I had been reading the TOS several times and you are right in theory.
AdSense code may not be altered, nor may the standard behaviour, targeting or delivery of ads be manipulated in any way that is not explicitly permitted by Google. This includes but is not limited to the following: clicking Google ads may not result in a new browser window being launched, nor may Google ads be placed in an IFRAME
There is no "in theory" when it comes to the rules.
It also says that you are not allowed to have the adverts open up in a new window either. (But you are allowed if you are in China.)
IIRC it was DFP that allowed adverts to be opened in a new window, but that clashed with the Adsense TOS.
Just do whatever you want to do. You will anyway. You just want someone to say that it is okay to do, then when it goes t1ts-up, you'll blame someone else or use it as an excuse to Google when you get banned.
You need authorization from Google to be allowed Adsense in an iframe.
Publishers are encouraged to experiment with a variety of placements and ad formats to enhance the user experience and thereby maximize their earnings. However, altering the behavior, targeting, or appearance of AdSense ads without explicit approval from Google is generally prohibited. This behavior includes but is not limited to placing ad code in iframes in such a way that manipulates the standard behavior, targeting or delivery of ads. An iframe is an HTML tag used in web design that allows a webpage, picture, or graphic to be displayed in a frame within another page. Our policies have always disallowed the misuse of iframes, and recently we clarified our language to explicitly prohibit the misuse of iframes in our program policies.
Adsense as fallback to DFP ok