Just booked a flight and searched to see if any Coupon Codes were avaliable and found this one. Pretty good as it pretty much cancels their bs CC fees (which have only recently been introduced)
Finder.com.au (where I found it), says only $25 off but at the bottom of my booking summary says $30 off.
Cashrewards tracked on top of this which was great too.
This may be the same code as the one you get from signing up to their newsletter but am unsure.
Im not saying this doesn't work, but i recently tried using this on a flight which was linked from Sky Scanner, filled in all the details, went through the entire process, to the point of even seeing a $0 transaction my credit card, only to have it fail at the very end, and then when searching for the same dates etc on the site after, it had no flights (as in, with any carrier) on those dates, yet when returning in a fresh browser, low and behold the flights i had originally selected were back available. So far, 2 out of 2 times I've tried using Aunt Betty I've had issues at the last stage of the booking, or even after them accepting the booking, then canceling it a day later, i just can't trust them, not worth the time & effort anymore.
Just be careful, and certainly don't use them if you are concerned about the flight prices going up, because they don't ticket instantly.