AdsDaq And Adsense On same page? With adsense as backup in adsdaq?

Hello,
I recently started using adsdaq for some of my lower paying adsense sites. As you guys know AdsDaq pays for only USA traffic, and for the rest they have got a backup code in which we can use Google Adsense as the backup code so that we dont loose on unpaid traffic.
I want to know if this is allowed by adsense or not? I checked the forums of adsense and saw nothing there.
jst want to make sure that this is allowed by adsense..
Also what is the adsense direct email support?

See original post by rohit147