This may be answered before. Because ANZ says $0.05 is awarded for every $10. Does that mean if I spend two times of $16, I will get
$0.05 x 2 for two $16 spent rounded down to nearest $10 each, or
$0.15 for total $32 spent
Basically, whether it is awarded at a transaction level or at a CC bill total level.
1) At transaction level,
Under the 5% category, 0.1 optimum$ for every $2 spending
Under the 1% category, 0.1 optimum$ for every $10 spending
2) At end of statement month, optimum$ from transactions posted in the month are summed up and rounded down to nearest 1 optimum$
So for example, if 2x $16 transactions made under the 5% category. 0.8 optimum$ for each transaction. 2x0.8=1.6 optimum$, but you get only 1 optimum$ awarded at the end of statement month.


