I've never paid a second year annual fee for a credit card before but i'm tempted…
20,000 points per month via payall (if recurring payment setup prior to october), which is worth about $100.
Citibank will halve the annual fee for me after calling them so $350 annual fee instead of $700 for the prestige card.
So you are looking at about $1200 worth of benefit for $350.
The kicker is that NAB may, or will, pull the rug half way through the year, so its a bit of a gamble.
Are you sure you don't have the prestige card? Premier annual fee is $300.
How are you able to get half price annual fee? Between payall, and priority pass, I'm already making ~$1.5k yearly so it is a yes for me to keep it assuming things stay the same.