As a reference point I used to pay for QF Long Haul J prior to discovering the mASA. Use of the mASA dropped my travel spend with QF by more than half.
Problem for me, of course, is that with the mASA gone there is no way I can get back to the budget I had prior to the mASA. (I'm spending that money in the business elsewhere.)
I can't afford QF so now know BA/MH/UL quite a bit better.
So the introduction of the mASA led to me spending less with QF and then it's withdrawal has reduced my spending with QF further.
The hidden "cost" for me is the points aspect. What was QF making out of me on the points side?
1/ You may very well also have simply switched from Revenue J to Classic Awards at some point to reduce cost (your mASAs came from the same Classic availability). You may have switched to mASAs as it gave you both SCs AND cash savings, but at some point the SC/$$$ balance would have shifted in favour of saving $$$ (as it subsequently has).
2/ You've also become more knowledgable and realized that you don't have to pay RRP for J fares to fly in reasonable comfort.
3/ You've NOT returned to paying for revenue fares. Clearly their existence was artificially keeping you "loyal" to QF. In your example - the natural evolution was for you to save money and look for better value options. The removal of "handcuffs" allowed you to do this.
4/ Prior to mASAs, I paid full QF RRP for a DONE4.
(I know - take my DYKWIA card off me).
According to the flawed logic by others in this thread - apparently with the removal of mASAs, I would have returned to paying these extortionate fares to QF.
For those with reasonable comprehension, you can probably logically deduce that the conclusion is somewhat different.
For you TonyHancock - what appears to actually have occurred is simply that you're now more aware of "value" than you were before.
mASAs didn't cost QF additional spend from you (or else you would've returned to spending more), in fact it's arguable that they kept you "in the system" longer than you would have.
The real question is - without mASAs, how long would it have taken to you to realize you were overpaying..??..??