What is PPLNS
PPLNS for "Pay Per Last N Share" is a payment method that rewards miners once the pool finds a block. The distribution of the block is then made according to the percentage of the shares of the miner on the last N blocks found by the pool.
This method of payment favors miners who have been mining for a few hours on our bitcoin gold pool. In addition, this method protects our miners against "hopper": miners who mine for a short period of time trying to mine only the good times.
Blocksmith offers this type of payment for its bitcoin gold mining pool. Miners can configure it from their settings page.