Google really should answer to the question why all of these other sites got knocked down but not Demand Media - aren't they the worst offender of all? I'm not

Google really should answer to the question why all of these other sites got knocked down but not Demand Media - aren't they the worst offender of all? I'm not sure I agree with the theory that it was their PR that did it. Putting on my tinfoil hat here, but did their recent IPO have anything to do with it? A lot of money is on the line now. When I saw the Sistrix data I was surprised to see Wisegeek take a big hit, because I usually get some utility out of most of their content (even though it is now plastered with google ads), whereas eHow is almost always useless.