Local champion seems quite hit/miss.
Always use the 5% off WISH cards at woollies, unless you value the points at more than 5c/$1 spend.
My local coles, all through manned checkouts (no self service), I have tried various amounts, separately - through splitting, etc, all in the past month or two.
I think minimum spend needs to be $40 to activate. Recent $30 transactions did not show up at all!!!.(Tried $2, $20 several times, $30. $40 ones went through). If it is going to show up on your app, it shows up instantaneously after the spend.
Also having issues with my MR points with Plat Edge. My coles have incorrectly shown as 60pts (for $50 spend - should be 150 points). And also with Dan murphys $50 spend for 60 points (interestingly, I spent twice on the same day - one showed $50=150pts, other showed $50=60pts. I called MR and they said they are investigating. Yes I did get $10 cashback with amex, but that has nothing to do with initial MR points