Bitcoin analyst PlanB says BIP 110 would set a dangerous precedent by allowing protocol rules to reject transactions.
PlanB, the pseudonymous analyst known for creating Bitcoin’s stock-to-flow (also known as S2F) model, has come out against BIP 110, arguing that the proposed anti-spam Bitcoin fork would undermine BTC▲$62,630.00’s role as a decentralized bearer asset. The analyst wrote in an X post:
“To be clear (if it wasn’t already clear from me retweeting Adam on this topic): I am against the bip 110 filter fork.”
As PlanB argued, supporters of the proposal misunderstand Bitcoin’s bearer-asset model, underestimate how much other users also dislike spam and have failed to learn from the 2017 Bitcoin Cash fork, when a dispute over block-size rules created a rival chain that never came close to replacing Bitcoin.
In later replies, PlanB suggested that enforcing BIP 110 would inevitably raise questions over who creates and maintains the filters and who decides which transactions qualify as spam or non-compliant. He argued that this could leave Bitcoin dependent on a trusted group making those decisions.
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Opposition Continues to Grow
BIP 110 would temporarily change Bitcoin’s rules to block transactions that use the network to store large amounts of images, text or token data.
Supporters say these uploads take up too much space and make Bitcoin harder to run. Critics say the plan would let the network decide which valid transactions are acceptable.
PlanB’s position follows opposition from Michael Saylor, the Strategy co-founder, and Adam Back, the Blockstream co-founder. Saylor previously warned the proposal would turn a dispute over spam into a consensus change, while Back argued that supporters were free to create a separate fork but couldn’t force the wider Bitcoin network to follow it.
Support for BIP 110 nearly tripled from about 1.1% on July 24 to 3.14% on July 27, though it remained far below the 55% needed for early lock-in, with only six of 191 blocks signaling for the proposal.
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