PoW is a closed feedback loop system. Doing PoW yields you a reward, that reward pays for energy, that energy runs your PoW. If PoW yields you anything other in

PoW is a closed feedback loop system. Doing PoW yields you a reward, that reward pays for energy, that energy runs your PoW. If PoW yields you anything other in addition to normal reward - for you as a miner the only rational thing is to run more PoW with it to get more rewards. That in turn will simply bump the difficulty such that any additional benefit yielded will match the additional required energy expenditure to get the reward.