JOINING BOOST & ACTIVATING YOUR SIM
SETUP & PHONE SUPPORT
RECHARGE & NETWORK SUPPORT
Do you mean this one?
That is only for new sim pack purchases (for new customer joinging Boost). It does not apply to existing customer recharging.
There was recently a Boost recharge voucher sale on through Coles instore, though. That finished a couple days ago.
* I am a Boost Australia customer. This is a peer to peer community where users help each other.