Check your emails:
The usual spend $$ over 4 weeks and you'll get $50 either as Flybuys points or supermarket discounts.
Both of my cards received spend $60 although my spending habit is not divided equally between them.
Please comment with your minimum spending requirements.
The next round. I.e. 3 rounds of $50 x 4 (taken up and met), one offer of $60 x 4 (ignored, all shopping at Coles ceased), then back to offering another round of 4 x $50 (taken up and met). Ironically the round after that they did not make me an offer at all, and I have no idea why (but again no shopping at Coles).
Sooner or later they'll work out the pattern: Does this person respond to offers? Yes, but only if we offer rewards >= 25%. Does this person shop here without offers? No.
In economics that makes me the most marginal & elastic customer in the shop, and all the most interesting stuff happens at the margins :-)