What Is the Main Advantage of a Pay-Per-Share (PPS) Fee Structure for a Miner?

The main advantage of PPS is its guaranteed, predictable income stream. A miner is paid for every valid share they submit, regardless of whether the pool actually finds a block.

This shields the miner from the pool's "luck" or variance. The pool operator absorbs all the risk of variance, which is why PPS fees are generally higher than other structures.