i still don't understand why it is showing no availability but i can still book it on cathaypacific.com

also, is the guarentee economy seat only works for gold member only?

lets say if im travelling with someone else and we are on the same itinerary, can i use the benefits for both of us?

and if we are not on the same itinerary, lets say im booking for my friend, can i use my benefit for him?

Thanks