I have to side with Niwashi on this one. For every upgrade from PS3 -> PS4 SE probably has to pay Sony a fee while PC licences are essentially free for them to create. SE has on their records (You can check via mogstation) who has a registered PS3 copy and it would cost them nothing to offer these players a PC copy instead of SE paying Sony a fee to exchange the users copy for a PS4 one. Sony has already had their cut of the PS3 licence and has no real say in what happens with that licence as far as how SE deals with moving players over to PC as it is a platform outside of their control and they already took the cut for the initial (PS3) licence.