If a fork does happen, coins can be split by including >83byte OP_RETURNs in transactions. Which would in turn create fee pressure and thus incentive for miners to mine the non-UASF chain.
Aaron van Wirdum's avatar Aaron van Wirdum
To be clear… Assuming Bitcoin Knots indeed adopts this BIP444 soft fork, there will be a chain split (airdrop coins) if: - The Knots UASF attracts a minority of the hash rate (but enough to mine at least some blocks) and/or - There is a URSF (user rejected soft fork) to counter it
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Block reward is dominating fees currently, so you'd need a miner that's willing to take the risk of mining an orphan block for relatively little gain.
The miner can just checkpoint this block, and so can everyone else.