As it happens, none of the earns have been within my regular spending habits. BP fuel - more expensive than where I get mine;
Yeah, I don’t do BP. Occasionally there’s a promo on something but can’t be bothered.
For many, CC has become harder (with lower QF earn). Especially a VA CC…

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sustainability ... (suppresses a chortle);
Yeah, probably not the best $/SC!
My recent DJs points posted a few days ago. Phew! But they were drowned out by QF Wine - another easy one for many.
Qantas insurance - you have to be kidding;
We just renewed AMT insurance with QF. Yes, it doubled from the current policy but so did they all, and when we started adding cruise and longer duration, the others rapidly matched QF. In the end, 20 SCs and a shed load of bonus points tipped the dial to QF (we took out seperate policy each instead of the usual duo for exactly the same price).
no Tas utilities in their realm;
I’ve not looked at Red Energy and probably can’t be bothered.
Woolies is probably one of the easiest. Only takes 1x $10 (2000 pts) transfer to 1k QFF points. With a whole year to do it! A couple of shops buying things on special during a spend X get Y bonus points - easy as.
Not sure when it changed but AVIS rentals OS now convert at a pts/$ rate rather than a flat 700 pts (domestic was always pts/$). So slightly harder for short rentals but I knocked it put of the park within 2 mths.
I do occasionally use Qantas hotels where I use some points to lower the cash cost of an expensive hotel I particularly want/need to stay in.
QF Hotels is another easy one - especially with triple points promos. The rate is usually the same as Expedia (sometimes more/sometimes less), and similar to Booking.com. We start with QF (if there’s nothing suitable to book direct: eg Accor, IHG etc). Only complaint is QF doesn’t include the larger property set available on Expedia nor even larger set on Booking.
The Banking one for me was dead easy. Parked $500 cash/stock in Webull for 1mth for 1000 QFF pts and 20 SCs! Happy days.