Quick and easy money, they sell incomplete games, then make DLC for more easy money.
I miss those days when they used to sell complete and longer games. Like RE4, it has tons of stuff, extras, etc, and you didn't have to wait for gold edition, or something. RE5 had story mode and mercenaries. RE4 on GC had story mode, mercenaries ona some extra modes(PS2 had more modes but I'm talking about the original release.)
[This signature was deleted at the request of the La-Li-Lu-Le-Lo.]