There has been no change to the PD policy. CC is happy to change your PT ticket to PD and save money on the ticket / get rid of credit hours.
This was a
rumour that GTC58 started in the
Freighter PXing Thread
It is false. Likewise, I am pretty sure the Dhaka Hanoi part of his post (crewing w/ 1 CN, 2 FO and 1 SO) is also false.