I did one of my $40 WW shops earlier today. At the end of the transaction my $30 Woolworths dollars appeared on the screen and on my receipt. I've just checked my account and it says I will get $30 off the next shop, whenever that happens to be. The reminder emails just came through for the accounts with the offer. I'm impressed that they've credited the funds instantly. Hopefully things work well on Friday for the second transaction.
It will be really funny if the next targeted offer has a required spend of $30. The checkout operator will wonder what is going on when I have to pay less than $1 when I finalise the transaction.
The same result with one of our accounts today. As soon as the 'pay' option was pushed it showed "You have $30 WoW dollars but would not allow them to be redeemed.
If you spend exactly the amount of WoW dollars you have (or a $10 multiple thereof) it causes the system to freeze and have an "error" attack. Seems WoW do not like having multiple items sold for a $0.00 total.
On the other hand - I like it!