A 1% protocol fee will be charged whenever DAI redemption happens in the system. Protocol fee before and after expiration are the same.
For example, redeeming 100 DAI will be charged 1 DAI as a protocol fee, and end up receiving 99 DAI.
Exchange Long/Short tokens into DAI in advance
Remove liquidity (exchange LP token into DAI) in advance
Redeem DAI with Long/Short/LP tokens after expiration