Do the opt outs make it easier to win in the ballot OR mean more tickets are available in the exchange?
I.e. if capcity is 30,000 x 30% = 9,000, but 1,000 opt out do 30% of these get immediately added to the exchange or do they increase the number of ballot winners?
The ballot will only be drawn from those who have indicated they want to attend the game (or not indicated they wish to opt out of that game, as the case will be), so exchange tickets will only be those who "win" and then decide they can not go, whether due to a change of circumstances or they are a "I don't want to go to any games" but have exhausted their six opt-outs.