A key point is that the SP required for AirNZ (& qualifying partner) ‘metal’ is not shown on the app, and is pretty hidden on the web portal. The app really needs a progress bar that shows the current ‘metal’ level and amount still needed.

Before buying that Audi, please do check that you have 100% understanding of where you sit in terms of sufficient ‘metal’ SPs to gain/retain the status you seek.

See my web portal screenshots - whilst I need a further 581 to retain Gold Elite, I need to ensure that 258 of these are ‘metal’.