Well when I think about this I can only come to one conclusion:
If the devs were not interested and were just waiting top dump there would be no deletion of pledges. Illogical as any community effort is likely to raise the value of their stake. So the only conclusion I can come to that I can make some sense off is : another exclusive / similar arrangement is being worked on behind the scenes which can not include another major exchange. If so there would likely be some need for ' a need to know' basis approach. Which obviously can't be posted on a public board.
Or: the devs stuffed up with an exclusive deal on CT. That would also make sense but would clearly label them as somewhat below standard from a strategic point of view. Not sure which.