I think this is a good move, the problem is how to determine which is MFA which is not automatically. Too many garbage MFA site are polluting the Internet.
http://www.sepguy.com/2008/03/17/google-reviewer-guidelines.html Thanks for the link, some really useful information there. I'm now a lot clearer on 'made for adsense sites.'
site that is using unupdated, duplicate, rss feed without permission, spamming keywords in my opinion are MFAs and google always punish those if they got informed.
The MFA's that google is going after are sites that have content, but there is almost no link on the page where the visitor can click that isn't an advertisement. So once someone lands on the page the only ways to get off the page are to close the browser, type in another URL, or click on an ad.
I for one am happy to see that Made for adsense sites are banned...worthless websites taking up space.