They're settled based on the score of the relevant quarter or half, not the full game.
If the period ends in a tie and the market does not allow a draw, it may be settled as a push.
If the game is suspended before completion of the quarter or half, bets are void.
Example: You bet on Team A to cover a +3 spread in Q2; if Q2 is not fully completed, the bet is void, even if Team A is ahead at the time of suspension.