So the Frequent Shopper Club was not part of the purchase of Tasmanian supermarkets- Roelf Vos in the north and Purity in the south - in 1982.The Club was actually started by Purity in 1992.The 2 brands kept their separate names until the early 2000s.The answer was found in plain sight.
en.wikipedia.org
I then had a fascinating read of a Tasmanian Parliamentary Committee into Grocery Markets and pricing in 1996.
The scheme was first offered to Independent grocers but they knocked it back as it would cost $40 to give the customer the $20 for 2000 points.The scheme was taken up and perfected by Purity and then a couple of year later by Roelf Vos.When it was just Purity prices in the south were 2-3% higher in the South.After being taken up by Roelf Vos prices equalised.
Reading between the lines Woollies do better with the FSC than EDR.
What was included in the sale agreement of Purity was to retain a State Office in Tasmania.Interesting reading from that 1996 report small producers could convince the Woollies Tasmanian office to stock their products but little success with Coles buyers in Melbourne.