If I don't know if I can sub a class 80 days from now, I have to see that email everyday. It's like a friend asking for a ride to the airport every single day for 4 months before the day.

Right Now users will have to Decline to stop notifications, but they should click MayBe if they are thinking to accept it at later stage, or FM should ask them if the sub request is not getting covered and still open before 24 hours of class if they can take it up:-