Ethereum’s priority fee market is splitting into distinct order-flow businesses, with MEV now leading spend
A new report from Greenfield Capital argues that Ethereum’s priority fee market should not be viewed as a single pool of demand. Instead, it is made up of separate order-flow segments with very different economic drivers, including MEV, Telegram trading bots, wallet trades, DEX frontends, smart-contract interactions, and solver-based systems. Based on onchain data, the study says the center of gravity has shifted sharply since 2024: retail-led Telegram bot activity no longer dominates priority fee spending, while MEV-related flow now accounts for roughly 66% to 80% of weekly spend. The report breaks MEV into three major categories — statistical arbitrage, sandwiching, and atomic arbitrage — and finds that each behaves differently in terms of concentration, opportunity frequency, and fee intensity. Statistical arbitrage remains the largest segment by DEX volume and fee outlay, sandwich activity has fallen from its earlier peak but recently picked up again, and atomic arbitrage has become more prominent and remains structurally fragmented. The study also highlights the rise of wallet-layer monetization and order flow auctions, arguing that priority fee rebates may distort how onchain data reflects users’ real willingness to pay. Among retail-facing products, MetaMask Swaps stands out for much higher average per-trade priority fees than in early 2024, while GMGN has emerged as a notable new spender after expanding to Ethereum mainnet. Greenfield says these trends matter because execution-layer rewards from builder auctions are one of the few validator revenue streams directly tied to demand for blockspace.







