Very nice amounts by some of the users here! Between all of my sites I'm averaging between $80-$120 each day with Adsense.
Yes you can, however I believe the application process is slightly different.
According to Google's website: "DoubleClick Ad Exchange is a real-time marketplace that helps ad networks, agency holding companies, and emerging...
It really depends on each site and each niche. To echo what others have already said, the best way to find out would be to do a bit of split...
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