Some locktime oddities on the #bitcoin network:
> However, setting the current block height as a lock-by-block-height forbids a fee-sniping miner to use transactions from the mempool his replacement block.
That's not true. What's relevant is that it only allows you to use mempool txs that have been in the mempool since last block, so you won't be able to use the most recent mempool txs and those are more likely to have a high fee.
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