I think that it’s rule based as the agents were able to tell on the phone pretty quickly if a bookable upgrade is available or not. (‘Nothing’, back in Feb/March, ‘Other flight on that day’ in April, ‘Yes’ in May - though they did ask me to put the request in through the online system, but that they would ‘hold’ it for me while reservations changed the existing ticket / I ticketed the underlying booking /sent the request through).

Do think that PoS/A availability is a factor (kind of like for awards for married segments)- but no clue as to the how.

“They have been well received as they come with higher inventory than Asia Miles redemptions (since they have been designed to reward members like you exceeding the Diamond renewal threshold) however to your point, I can’t guarantee that these complimentary upgrades’ availability will always match the availability of Revenue seats you refer too.”
(I had asked about A/whether PoS/if so which PoS- HKG or the underlying ticket’s).

[MENTION=45820]sxc[/MENTION] [MENTION=121831]cxfan1960[/MENTION] - might it be better to merge this thread with the other one?
https://www.flyertalk.com/forum/cath...periences.html