> The reason for this is that Directors of Fraud are aware that the policy choices available to them impact the user experience of fraudsters and legitimate users alike.

I think herein lies the crux: All things interact, and if you think they don't you are just not aware of how. The game is identifying and moving the cogs that a) are either most important and isolated to get you where you want most efficiently or b) interact favorably in concert.

You win relatively by understanding this better than others. You win absolutely by seeing or creating an opportunity to implement a brand new cog.