Can I earn Miles on an unused ticket?

No, Business Rewards Miles can only be earned once a flight has been flown.

As a Business Rewards Member, do I get access to lounge facilities at the airport?

Can I earn Business Rewards Miles on flights taken before I joined Business Rewards?

If I am already a Qantas Frequent Flyer, can I earn Qantas Frequent Flyer points in addition to my Skywards Miles?