Game theory is at the heart of bitcoin. Whilst that may not play out with miners against each other it certainly plays out within the ecosystem. It is currently most profitable to focus on deploying the maximum number of rigs efficiently, it may become more profitable to sabotage other miners in due course. I can’t say if it happens yet but it would work woth single figure numbers of large mining entities competing to either exclude smaller operations or to gain advantage over their peers…. The joy of game theory in this instance is that if you damage one competitor you enhance all others (including yourself).