Hi, i have saw on few sites that they put adds in small popup window. For example on this site: http://www.softpedia.com/get/Others/Finances-Business/AccelMax-Cheque-Writer.shtml click on Download button in right column. Is it OK?
Why not just check the policy: https://support.google.com/adsense/answer/1346295?hl=en#Placing_ads_in_pop-up_windows
By policy it says that it isn't allowed but this site doesn't have problem (maybe they have some deal with adsense because they have millions of visitors)
1. I can not see them in pop-ups on that site 2. They could be breaking the policy, in which case you can report them 3. They could be a premium publisher in which case they can negotiate their own terms of conditions and Google permitted in their case
I have seen small sites using modal dialogs with adsense.. It is really against TOS. Once, I asked this to google, via google groups but never got an official answer.. Well, seems I am not a premium publisher.
You should avoid it. Pop-Up ads working with Premium Publisher or Large Scale level. Unintentionally Click on Ads chance is higher in Pop-Up. Which is against the TC's of Adsense.