Qantas is one that will offer a 10% discount in such cases
https://help.qantas.com/support/s/article/Compassionate-airfares
Not aware of Virgin or Jetstar having a formal process.
It's not targetter, and part of the normal November campaign from a bunch of banking partners.
Middle of the road for Amex, probably about average, but they vary between 10% and 20% .
Given everything that goes into determining how many status credits you earn on a flight, the current status credit system on Qantas is basically a proxy for a spend based system. While not a very good proxy in that it is not a linear relationship between spend and status credits, it does take...
I've done Perth to Hong Kong, via, umm, Perth. On the initial flight got to around Port Hedland when a medical situation arose, and ended up flying back to Perth
Qantas opted to go with a system that would work across its route network - including trans-pacific. That system got delayed, and while maybe they could have changed tack and gone with Starlink, they seem to be sticking with what they chose.
If is is a 3% cash advance fee, suggest you spent $152 on the cash advance. Maybe $150 for the card and a $2 fee.
For interest, seems roughly correct for $152 for 27 days.