Perhaps that is because they are unable to join your advertising profile with your account, under various terms of services and agreements.

"We will not combine DoubleClick cookie information with personally identifiable information unless we have your opt-in consent."

So you can't really expect them to be able to cough up the contents of profile 0x3f47d0387acb94857 when asked for the history of your account, if they are forbidden from joining the two domains together.