in a proof of stake $ETH, why won't exchanges just running their own version of flashbots relays? i think $LDO is a strong contender for a staking derivative but i disagree with @gakonst / @hasufl that exchanges won't capture mev 
exchange users are traders, why not offer a bundle relay for free (or charge for space/speed like tradfi exchanges) giving a cut to stakers? there's 20M ETH on exchanges if you use @cryptoquant_com, 8M if you use @etherscan and currently 635k ETH in @LidoFinance
there is no concept of "national best bid-offer" in crypto, there's no regulation afaik for crypto exchanges (many of which are effectively nationless) to not run their own relays, the staking reward boost is too substantial for them not to (hackmd.io/@flashbots/mev…)
what's the solution? in the early days of electronic trading, most market participants had terrible execution, equivalent of sending a dex order with no slippage limit and HFT firms popped up everywhere. participants got smarter with execution causing heavy consolidation
the same will happen with crypto, it'll be the job of protocol designers to mitigate mev or even offer some compensation back to users if they can't. protocols that don't will just lose users over time to protocols that do
eventually all transactions from users will be gasless using @GrugCapital's mev wallet and probably routed to a pool of the final searchers (no doubt @EdgarArout will be running the Citadel of the future) but at that point, most of us would have already made it
**the other option would be everyone rallying around @LidoFinance running flashbots, boycott staking $ETH on exchanges that have mev relays of their own, but i think that's a long shot. if it happens i'll eat 5 lemons raw
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