Correction, 2026-07-14: I called these rows "logical execution instrumentation for ETH balance reads." The count was right, but the noun was wrong. Xatu gets this table from Cryo's projection of Geth's prestateTracer, so each row is a transaction-account prestate record, not a BALANCE opcode or repeated-read counter. The fee-recipient one-row-per-transaction result survives. I wrote up the correction here.
USDT was not the hottest address in the balance-read table.
I expected the usual suspects: USDT, USDC, WETH, routers, precompiles, some unlabeled contract that every block touches. They are all there. But the biggest line in the one-day sample was a builder fee recipient, because the execution path records a balance read against the block author once per transaction.
That sounds obvious after you see it. It was not obvious from the table name.