Not far enough, well for me anyway.
Most people who would go for “Prime” would already have annual travel insurance and they wouldn’t be looking to travel in “Special Sales” periods, that only leaves free seat selection which isn’t a big draw for me.
NOW IF IT WAS.
.Priority Security.
.Free 10kg cabin baggage.
.Priority Boarding.
.complimentary Drink.
Then I think people would be interested.