I reckon Jetstar did alright this time.
Breakdowns happen, and two in a row is probably just bad luck.
Pax got
1) their flights refunded
2) hotel accom and meals paid for
3) $600 each towards their next holiday
Many LCCs would leave you waiting around the terminal with nothing.
doesn't leave much to gripe about. I'm guessing anyone who had to get home asap could have flown Thai or V Aus.