I was approved for this card a few days ago. However, I realised this morning that since I already have Virgin Money's Virgin Australia Velocity Flyer Card (applied and received last month), I'm not sure if I'm eligible for the 300k bonus points, since Virgin Money cards are administered by Citi.
As discussed by others, the terms and conditions of the Citi Prestige Credit Card aren't clear:
Does anyone know whether existing Virgin Money cardholders are eligible for Citi-branded credit card sign-up bonuses? Yes, I should have asked before signing up, but hindsight is 20/20.