Well the planets have aligned.
This morning I received a targeted 50% Bonus offer to fly to Sydney and as
@esseeeayeenn pointed out, it is not limited to a destination and, if I am reading it correctly rather than through Rose-coloured glasses, it includes code-shares.
From the T&Cs:
An eligible flight for the purpose of this promotion means any Qantas marketed flight with a QF flight number on your ticket where Status Credits are normally earned. 50% more Status Credits will not be earned on some fare types and booking classes including Classic Flight Rewards.
So I asked +1 if she had received any offers and yes, she received an offer to fly to London with 50% Bonus SCs yesterday, with the same terms and conditions.
Our offers do not have the same booking or travel dates BUT they do overlap

Seems like a good time to spend that $450 travel credit that expires around the same time as the end of the travel period.