I read that a new e-ticket will be issued with the new PE booking class. So before you bid you better make sure the PE booking class will earn mileage on your FF program. On UA, e.g., N and E currently do not earn any mileage.
HTB.
Good point,
htb. TK currently credits 100% to G and 0% to N, E. Do you think there's a way to know which class do these upgrades book into?