I don't know if exploit is the right term!
Looking at the reloadable, max initial load is only $100 so if you buy the card with a normal Visa/MC you will also earn the points from that $110 (inc $10 fee) - instead of using a vpay voucher and getting no points.
Another option in theory is to buy a Gift/Online MC with $1000 initial load + $5 card fee and earn normal Visa/MC points on $1005. Then pay the $5 conversion fee to a Reloadable then put your vpay into that. You are "out of pocket" the same amount but earn more points.
The daily limit for ATM withdrawals for the Reloadable appears to be $300. The PDS is not easy to follow:
If you do not increase your card limit, the max daily ATM withdrawal in Australia is $300.
If you do increase your card limit, as of 1 July 2016 the max daily ATM withdrawal in Australia is $300 (formerly $1000).
Limiting your "cashback" to $300 a day is also something to consider.