All, I was reading thru some of 1K benefits and had couple of questions. If these have been answered somewhere please quide me to them. Thanks in advance. Items 1)Instant upgrades on Y- or B-class full-fare economy tickets & Instant upgrades on M-class economy tickets:-- Do you still need to use ones GPU or you are mercy of availability 2) Access to most sold-out flights:- What does this mean? as any one availed of this?