the transaction is actually completely standard, and in fact was observed in mempool.space's mempool before it was mined.
Then that is perhaps the most fascinating thing about this transaction
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Yes. The fact that this transaction made it into block 850000 (definitely not an accident) also suggests that it is completely standard. It would have been very risky to ask nicely of every major miner and risk that 850000 got mined by someone else.
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