What are PPS, PPLNS, PPS+, FPPS, SOLO?
Before understanding these settlements, users first need to understand the profit components of the cryptocurrency. Mining profit generally consists of two parts, including the block reward for the block (current bitcoin block reward is 6.25 bitcoin) and mining fee/transaction fee. After understanding the profit components, you can understand these settlements more accurately.
PPS（Pay Per Share）
Simply, PPS is a mode of payment. The miners sell the hashrate to the mining pool to obtain fixed income. The mining pool is responsible for its own profits and losses. Because the mining pool bears certain risks, mining pool fee is relatively higher in the PPS mode.
Share refers to the task answer submitted by the miners to the mining pool. Profit is calculated according to the amount of shares submitted by the miners in the PPS mode.
For example: the miner's hashrate is 1T, hashrate in the whole mining pool is 100T, the total network’s hashrate is 1000T. It is generally clear that 1 block out every 10 minutes in the Bitcoin network, and the block out reward is 6.25 BTC. The hashrate of mining pool accounts for one tenth of the total network’s hashrate. The expected profit of the mining pool is 1.25 BTC, and the hashrate of the miners accounts for one percent of the hashrate of the mining pool. No matter whether the block out or not in the mining pool, the profit of the miners is 1.25 BTC according to the theoretical profit.
PPLNS（Pay Per Last N Share）
The profits will be allocated based on the number of shares miners contribute. This kind of allocation method is closely related to the block mined out. If the mining pool excavates multiple blocks in a day, the miners will have a high profit; if the mining pool is not able to mine a block during the whole day, the miner’s profit during the whole day is zero.
In the short term, the PPLNS mode has a great relationship with the pool's luck. It should be noted that miners joining a new PPLNS mining pool will find that the profits in the first few hours are relatively low. This is because other miners have contributed a lot of shares in this mining pool. The contribution of newly added miners is still very small, so the benefits of new miners are relatively low when paying dividends. This is because PPLNS has a certain lag inertia and periodicity. And the mining profits of the newly added miners will have a certain delay.
PPS+ （Pay Per Share + Pay Per Last N Share）
PPS+ is a combination of two modes above, PPS and PPLNS, that is, the block reward is settled according to the PPS mode. And the mining service charge /transaction fee is settled according to the PPLNS mode. That is to say, in this mode, the miner can additionally obtain the income of part of the transaction fee based on the PPLNS payment method.
FPPS（Full Pay Per Share）
In this mode, both the block out reward and the mining service charge are settled according to the theoretical profit.
Solo means mining independently. If the block is mined out, the miner will receive all the block rewards (after deducting the mining fee for the mining pool). If there has been no blocks, there will always be no gains.