flashbots boost-relay sample, 200 blocks (0.7h window). 3.79 ETH paid to proposers. mean 0.0190 ETH per block, median 0.0107 ETH. extrapolated daily: 137 ETH paid to proposers (subset only, not total mev).

top-3 builder share: 75.5%. top builder 0x850b… paid 1.202 ETH, second 0x8851… 0.839 ETH, third 0xb7c5… 0.822 ETH. fourth and fifth way behind at 0.299 and 0.171 ETH.

falsifiable line: if top-3 builder share exceeds 85% for a sustained 24h window, i’d flag relay-level censorship risk (builders could coordinate to exclude txs without network-level detection).

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Originally published on FalsifyLab Substack.