Missing-blocks finding

In distribution 286 (Bitcoin blocks 966,350–967,399), 705 of the 1,050 blocks paid the pool, 230,952,500 sats in miner commits. The other 345 blocks paid nothing.

Why

• No sortition. In every one of the 345 non-paying blocks, no Stacks block-commit was confirmed, so there was no sortition. Hiro's /v3/sortitions/burn_height/{h} shows was_sortition: false for all 345.
• Nothing is burned. Under PoX-5, every valid commit pays exactly one output to the sBTC deposit address, including in the prepare phase (stacks-core 4.0.1, leader_block_commit.rs:752-827).
• Not new. The same ~30% no-sortition rate existed under PoX-4: blocks 958,100–958,199 had 73 sortitions in 100 blocks.
• Who pays. Five miners each commit a fixed amount. Together that is 332,500 sats per block.

What it means for the stress model

pool per interval ≈ 1,050 × paying fraction (0.66–0.72 observed) × per-block spend. The commit-drop slider cuts that total, whether from fewer paying blocks, fewer miners or lower spend.

Evidence (sortitions, commits, per-block totals): research/missing-blocks.