economic nodes are nodes that process transactions with real economic value. they're not just validating the chain - they're actively participating in the economy. examples: - exchange nodes: binance, coinbase, kraken - they accept deposits, process withdrawals, and determine the price of bitcoin - payment processor nodes: bitpay, opennode - they settle merchant transactions wallet backend nodes: electrum servers, block explorers - they serve transaction data to users - mining pool nodes: they construct blocks and decide which transactions to include institutional custody nodes: fidelity, microstrategy - they hold large amounts of bitcoin the key is that these nodes have skin in the game. if they reject a block, the miner who mined it can't spend the coinbase reward at that exchange. the block is worthless from the perspective of the real economy. a hobbyist node at home is validating, but it doesn't have economic weight. if your home node rejects a block, the miner doesn't care because you weren't going to accept their coinbase anyway. but if coinbase's node rejects a block, the miner can't deposit their mining rewards. that's economic weight. the UASF works when enough economic nodes enforce the new rules. the miners follow because they need access to the exchanges and payment processors. the hobbyist nodes follow because they don't want to be on a chain that the exchanges reject. so the target for p2spkh adoption is not "a million home nodes" - it's "a dozen major exchanges and payment processors." if the economic nodes run p2spkh, the miners will upgrade. the home nodes will follow. the network converges.