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It seems this person(s) is just copying the same site and publishing it again and again under different domain names. The new domains keep popping up on my site in AdSense ads and I keep blocking them.
Is it possible that enough publishers are blocking such sites and the MFA's are having to constantly switch domains?
Or is that too optimistic and instead, are the MFA's so profitable they are just repeating the same thing under a number of domains? Since they are advertising their MFA sites using AdWords, I don't think they have any concern about a duplicate content penalty.