Just thought I'd share my experience of the Double Status credit offer.
I'm not trying to get status on QF, but I am planning a trip to LA in June. I was wanting to get on QF11 on Friday so I could knock off work, fly up to LA and arrive at a time when I can check into my hotel. The price for the dates has been a bit steep though ($2040 return). The day after the double status credit offer ended I got a Google Flights notification that the flights I wanted have now dropped in price by $700!
Glad I wasn't lured in by the DSC offer, the $700 is definitely worth more.