I agree that you "pays your money and takes your chances" as they say but the OP's post was about the fact that Qantas had a sale (where he/she booked) and then followed it immediately by another sale. One would generally expect that a sale is a discrete occurrence i.e. prices would revert to normal (whatever that is) at the conclusion of the sale. I don't think there was any indication of wanting recompense but just pointing out that what they did was a bit "off".
Hello people, Sales being one off are old hat these days, we have the Pre Christmas pre easter etc.
21 st century everyone, like it or not. I actually think airlines have been slow to pick up on the sales being on going. Ever been to JB Hi Fi, they spend a lot of money making it look like a sale.