Better uses of the $30 credit:
Load airline meal vouchers to food/drink apps | DEM Flyers
The 1:45am flight means ticket counter opens at 10:45pm. You will not be able to get to Polaris or Amex Centurion in time. Your only option is the United Club by the F gates, which closes at midnight. I had some underwhelming soup, sandwiches, and fruit. Then you get kicked out to the terminal. Try to sit near the gate, because ANA boards NH107 fast as hell even though it's a widebody.