According to Delta, when flying KLM "Mileage credit is not applicable for fares booked in D, E, G, N, V or W class."
What if I have bought a ticket already, entered my NWA worldperks number, and the flight takes place at the end of the year. Since WP ceases to exist on October 1, miles will post towards my SM account - does that mean I will not get mileage accrual since I am flying on a V fare?