I think this is the explanation for why it happened: https://manifold.markets/Predictor/which-team-will-win-super-bowl-lvii#7VGcsnF46ZBB7rv7Udg0 and I think I agree. Shame that it happened but I would have probably resolved N/A if it was my market. But I could be wrong. https://help.manifold.markets/ef908a19ee0e4eeab78359900b23708d

The lesson here is every free response market needs some attempt a resolution criterion that works for arbitrary sets of answers, even if it's just "pick the oldest answer that a reasonable person would interpret as true" or "pick the oldest correctly spelled true answer".

Manifold doesn't ban people for bad resolutions - at least, they haven't yet to my knowledge. And this one is vaguely defensible, not a direct rugpull.

I will not bet, and this market will resolve either YES or NO.

Unsure, but I think maybe it always should be technically acceptable for people to resolve N/A and for this to be socially regulated only?