Well, they've reduced the liability... by around 0.34% 
This morning's investor presentation seems to imply that the unredeemed frequent flyer revenye (i.e. liability) stood valued at AUD 3.1bn as at 30 June 2022. (https://investor.qantas.com/DownloadFile.axd?file=/Report/ComNews/20220825/02557909.pdf, page 29). However, on page 62, they actually do not talk about absolute numbers of members etc, just relative to 30 June 2021.
