Does that Fat Princess game have IAP? If no, what's the purpose of that game? To advertise the PS4 game? Piece of Cake was out months on mobile months before that was out. Also, why give Vita owners the PS3 game? Wouldn't the PSP version, which they could actually play on the same device, be better?
It's F2P so you betcha. They mention it in the press release, as well.