I know the tournament hasn't started yet, but I had an idea already: Agoran Bingo.
Quick summary of bingo in case it's not a thing in other countries: players have 5x5 boards; the centermost square is "free" (automatically counts). The remaining 24 symbols vary from board to board, both in which ones they are (they're a subset drawn from a larger population) and in their arrangement. The goal is to be the first to fill a winning arrangement of them, which by default is 5 in a row horizontally, vertically, or diagonally. Sometimes other winning patterns are specified at the outset (4 corners; 2x2 square, etc). Having additional squares filled in beyond a necessary set of them is irrelevant (that is, you don't need to ONLY have the 5 in a row).
An example event in our case could be: "A CFJ gets judged TRUE, and you neither called nor judged it".
The commitment mechanism makes it practical to have secret boards. The admin (Callor?) publishes, say, 100 event sub-sets and 100 24-element permutations. A player commits to secret numbers A and B, and publicly draws C and D, all in 1-100 inclusive. (AgoraBot works for the draw; folks not on Discord could use a prespecified future randomness beacon or have the Callor draw them.) Eir 24 events are given by the number congruent to A+C mod 100 and the arrangement of those events on their board is given by B+D mod 100. When claiming a win, e reveals eir commitment to A and B and points to archived emails where the relevant events happened.
Also, when drawing the sets of 24 events, they could be weighted so that super common and super rare ones get drawn less often.
-- Mischief Collector, Illuminator, Notary, Prime Minister Hat: steampunk hat Vitality: ghostly Bang holdings: 0
