这些支付方式曾被早期比特币矿池使用，但目前已不再被主流矿池使用。
PPS (Pay Per Share): Pays a fixed amount for each valid share submitted, based only on the block subsidy (ignoring transaction fees). The pool absorbs all luck variance. Largely replaced by FPPS which also includes transaction fee revenue.
PROP (Proportional): Distributes the block reward proportionally among all miners based on shares submitted during the round. Simple but vulnerable to pool-hopping — miners could jump in right before a block was found.
DGM (Double Geometric Method): Hybrid approach where the pool operator absorbs some risk by receiving a portion of payouts during short rounds and returning it during longer rounds. Designed to normalize payments and reduce variance.
BPM (Bitcoin Pooled Mining): Also known as Slush's method. Older shares from the beginning of a round are weighted less than recent shares. This reduced the incentive for pool-hopping by making late-round shares more valuable.
SCORE (Score-Based): Rewards are weighted by the time work was submitted. Later shares in a round are worth more than earlier ones. Similar intent to BPM — discouraging pool-hopping.
SMPPS (Shared Maximum Pay Per Share): Similar to PPS but the pool never pays out more than it has earned. Protects the pool from going bankrupt during unlucky streaks by capping payouts at available balance.
ESMPPS (Equalized Shared Maximum Pay Per Share): Variant of SMPPS that distributes available funds equally among all miners rather than prioritizing any group.
RSMPPS (Recent Shared Maximum Pay Per Share): Variant of SMPPS that prioritizes the most recent miners first when distributing available funds.
CPPSRB (Capped Pay Per Share with Recent Backpay): Uses a maximum PPS system that pays miners as much as possible from block-finding income without going bankrupt. Unpaid balances carry forward to future rounds.
POT (Pay on Target): High-variance PPS variant that pays based on the difficulty of work returned by the miner rather than the pool's overall difficulty. Rewards miners who submit higher-difficulty shares more generously.