I found an interesting glitch and i have yet to see the potential in it but maybe you do. So i'm using my cousins PS4 and both of our accounts are on there with PS+ with his account as the primary. So i started on his account (which doesn't have Cod Ghost) and then switched to mine (which does have Cod Ghost.) I started playing Cod Ghost. I then went back on his account while i had the Cod Ghost application on. It told me that it won't sign the other user out while playing on this console. When i went back into the application on his account we were both in the lobby before searching for a match. I joined a game and we both went but not split screened. In game it was split on top and bottom but the pov was like Quake and it was unlike any glitch i've experienced. Hopefully someone can find something cool of this. Maybe try this on a game like Bf4 that doesn't have split screen.