Kind of moot now, but I found another address which has had a shitload of funds sent to it, around the same time that the other two addresses were highly active (about 8-9 hours ago)
23000000 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
95000000 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
80000000 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
97000000 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
98000000 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
97000000 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
96000000 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
total: 563,000,000 PCN
In the past 24 hours there have been further transactions sending large amounts to this address, ultimately sourced from the premine block:
99000000 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
99500000 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
96500000 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
98888888 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
99999999 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
98989899 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
99999977 -> PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia
total including the first set of transactions:
1,278,878,763 PCN (note this is the total to this address only - there have also been large sends to others)
Coincidentally, several million more PCN have appeared in the order book on coinexchange.io in the past few hours.
I'm fairly confident that PR5mGbfxFkoJnn4h2xitckPYTDqBytB3ia is the deposit address for the dev's coinexchange.io account.