I've just been to Woolworths in Rockingham, WA to buy some of those lovely Grainwaves chips that were posted here. Of course, they didn't have any left, so I did a raincheck. To make up for the inconvenience of having to get a raincheck, they take $2 off your total raincheck. So I r/c'd 6 (I know!) packets and $2 off will mean I get one and a bit packets free. I also r/c'd 'In-A-Biscuit' biscuits and got $2 off those as well.
Just thought I'd let everyone know. I'm not sure which other W/W's do this but I'm sure Rockingham can't be the only one?