Mention-count markets are listed as mutually exclusive buckets — 0 to 24 times, 25 to 49, 50 to 74, 75 or more — and exactly one of them must happen, so their prices must sum to one. In practice the exciting high bucket gets bid up while the boring middle ones go stale, and the set sums to well over one. You sell the whole overpriced set, or the specific rich bucket against the cheap ones, and collect the excess.
Markets on Polymarket where count-bucket ladder arbitrage is the natural play:
