There's a big difference between an MMO though ... the online play is the only play, it's not in any sense single player nor would you buy it to play alone or when you're disconnected.

With C&C4 it had the single player stuff and the multiplayer stuff just like them all - online play was there and it added lots of value to the game just like it has historically, except they crippled the non-online play by needlessly forcing a constant online connection (if you dropped out you could complete the current game, not save it, not start another), moving your saved games and everything else to their servers etc.