What Are the Economic Incentives for PoW Miners in a PoA System?

PoW miners in a PoA system are primarily incentivized by a portion of the block reward, which is granted for successfully finding the blank block header. This reward is shared with the PoS validators who sign and finalize the block.

The incentive structure is designed to be sufficient to cover the energy costs and maintain network security through hashing power. This ensures a continuous supply of PoW effort.