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Agreed, the more options you add, the initailCost goes up.
Its better to bundle the tie into NO option. For example, look at the following criteria:
Dolphins vs Bills on Sep 18: Bills Win?
Resolves YES if Bills is the official winner on NFL.com, overtime included. Resolves NO if the game is recorded as a tie. If the NFL awards a forfeit, the awarded team is YES and the opponent NO. If postponed or rescheduled, settles when the NFL posts a winner; if canceled or ruled no-contest with no winner, the market is void. Uses the winner shown at settlement time; later changes don’t apply. Source of truth: NFL.com; backup: ESPN/AP. Close time is 8:59 PM PT on Sep 18, 2025.