Accumulating miles has to the actual travel only. So airlines are paying passenger miles and can not pay immediately after the flight is paid after travel within 7 days.
Mileage will be the only actual travel. Airline miles to pay for the passengers. And can not be paid immediately after the flight. After the trip will be paid within seven days.
Mileage will need to travel occurs. The airline will pay miles to the passengers. And can't afford to immediately after the flight to pay after the travel within the 7 days.