I didn't suggest that I did know they were under NDA ABP; reading comprehension doesn't seem to be your strong suit.
I am defending no one, what I suggested is that no one knows if NDA's are/have/continue to be the reason for lack of insider buying. We certainly know the blackout period occuring now would account for the current moment in time. Whether or not NDA's are the reason for the complete lack of insider buying remains to be seen.
Great analytical work determining that there is no insider buying though, keep up the good work.