Ive just flown with virgin australia a few weeks ago.
I am not a virgin australia member frequent flyer point, Is it posible to register a virgin australia member frequent flyer point for free or do i need a credit card for it ?

Also if i join today... can i redeem my points from my few weeks ago flight i had with virgin australia domesticaly ?

Also is it worth been a member know or should i wait around christmas to see the new virgin australia frequent flyer member thing which is going to be change something better. ? Since virgin australia is changeing a day by day... they too also changeing the frequent flyer points card thing by christmas.