Some AdSense publishers believe that advertisers don't care where their ads appear; others (I'm among them) disagree with that premise. Feel free to share your own advertiser viewpoint at:
[webmasterworld.com...]
Some of the sites, as you labeled them as "Made for AdSense" at least produced some conversions and gave a decent ROI.
For me, I don't need a research but go after a good return on my investment.