Cost per kill ("CPK" in industry lingo) is a dark phrase that feels disturbingly within reach of some of these companies.
Yeah it's sort of alarming when you think about hooking up models to take action in the real world and telling them it's just a game. Several scifi stories have it as a plot twist that humans think they are playing a game but are killing actual people. I'm not sure if the same twist shows up for AIs but it seems like an increasingly real possibility.