This new policy is

especially for Silver Elites. I am barely making Gold for the last few years. Paying $50 for a standby may be too expensive.
I am still not clear on later standbys.
If my scheduled flight is at 6 am (first flight of the day), and I want to standby for a 8 pm flight the same day, do I call the previous day after 8 pm (24 hour window) or call after 8 am on the day of the flight (12 hrs within the flight departure) ?