User blog comment:Capt. Miller/Infinite Warfare Zombies Reveal on the 16/@comment-1916935-20160815195855/@comment-1916935-20160816164042

I'm pretty sure it was Acti's decision for IW to have a zombies mode, not the dev's. Just like how, iirc, the reason Dr. Monty's Factory is in zombies mode for BO3 is so players can spend real money on the liquid divinium vials, which was once again Acti's decision.