Yeah, I think this too because they removed these extra 3 character slots on the PS4 and the XB1.I think the 3 locked slots have something to do with your sp characters.
Theres some other thories about these slots, but i dont see the point of keep them locked all this time, so my guess is they are locked because its your sp characters slots.
I want Rockstar to increase the map as well, but they kind of painted themselves into a corner by stating Online takes place before single player. If they really wanted to, they could expand the map and come up with some pretty outlandish explanation, but I doubt they will. I hope I'm wrong.New SP DLC Coming Next Year or Soon,Hope Online also WIll Increase Map or They Will Unlock Other 3Slots Soooooon...
I did that before rockstar took everybody money. The slots are saved for future expansion packs.Nothing, as long as there's glitches that can exploit it not to mention the fact that people will store 90 extra adders in 9 different 10 car garages in emergency case of a money wipe.