Those PMs are for your personal info about the happenings with GBDX. Yes they would like to see all the PMs that you got, but you better read the TOU. That should explain everything about PMs to you. In the mean time mums the word.
LOL,, Every wonder WHY that was put in the TOU??? Guess what,,, Just take a Wild Guess... LOL... Don't need to reply either, I'm sure you already know....