Aero just started charging arbitrage bots for being in a hurry.
As of today, select Aero pools on OP Mainnet run SlipstreamV3's MEV tax. When a swap's priority fee clears a threshold tied to typical retail activity, the pool adds a fee that rises with the bid. Ordinary swaps pay nothing extra.
The take goes to fee-earning LPs, or to the Token Operators and sAERO holders steering rewards to that pool. The sequencer still keeps every priority fee it's paid. Aero calls the pilot "conservative," built to collect data before it spreads to more pools and chains.
Bots have been tipping the sequencer to cut the line for years. Now the line charges a cover.
Source: Aero, "The Aero Economy"