I've never bothered with FlyBuys because i only spend $30-60 a week on groceries, as I spend a lot of time travelling or dining out. If I were to bother, what would I reasonably expect to gain, given you cant convert to QFF points?
Similarly I've never used my Woolworths card as Im lucky to spend $10-15 there every 4-5 weeks - basically only make the effort to go there if I cant get something I really need elsewhere. I had Woolworths as a client years ago and have always been appalled at how terribly they treat their back office/corporate staff and their attitude to suppliers, especially their treatment of local farmers.
I rarely used cash for anything (except the odd restaurant in Chinatown that wont accept cards) so 99.9% of every dollar I spend is on points earning credit cards. Big believer in consolidating earn, so Flybuys being standalone doesn't seem to offer anything - happy to be corrected.