One 10 by 10 grid, sold once, that pays on every game of the tournament. The winner's last digit meets the loser's, and the round decides what the square is worth. Flat $20 for the commissioner.
Rows are the winner's last digit and columns are the loser's last digit. When a game ends, the winning score's last digit and the losing score's last digit meet on one square, and that square is paid for that game. Overtime changes nothing: only the final score counts.
Every game from the round of 64 through the title game. The play-in games are excluded unless the commissioner turns them on.
By round, and each round's share is divided equally among that round's games. The default is 16% each for the round of 64, round of 32, round of 16, round of 8 and the semifinals, and 20% for the title game. The commissioner can set any six whole numbers that total 100 before the numbers are drawn.
When the 100th square is claimed, or at the first tip of the first paying game if squares are still open, whichever comes first. The commissioner can also draw manually. There is no reshuffle once a paying game has tipped.
It follows the rule the commissioner picked: roll every unclaimed share onto the title game (the default), roll each one onto the next game with a claimed winner, or the commissioner keeps it and the ledger records it as unpaid.
One flat $20 league fee, paid by the commissioner, whatever the size of the pool. Claiming opens once that fee is paid. Members never pay TourneyRun and square money stays between the players and the commissioner.
Yes, up to the per-person cap the commissioner sets, anywhere from 1 to 100. Each claimed square shows the claimer's name on the grid straight away.