MMs are actual businesses. Do you serious believe NITE, for example, is interested in message boards or the people who post on them? Believe me, they aren't.
And as one of those people who's VERY often said to be working for the Evil MMs, yes, I would know it's bullshit.
Do the folks who believe that also believe someone keeps track of who posts what, how many replies they get, and so on? Some apparently do. It's absurd.