>"we don't understand if DNT is on because [...]"
Well they can just stop right there, because anybody's *motivation* for setting DNT is a) not part of the technical spec and b) none of their fucking business. "Do Not Track" does not mean "Try and second-guess the user's motivation". It means "DO NOT TRACK" and nothing else.
Any claim otherwise is specious entitled bullshit peddled by marketing wankers who are just using motivated reasoning to try and justify doing exactly what they wanted to do in the first place anyway. It's not a legitimate argument and should not even be acknowledged as such.