Here are some feedback on what members may like:

Have another tier where members could redeem $50 with points
Let them have Aust post option but additional charges

While I know there is an vip membership which is quite high to achieve for some, have a middle tier one with less perks?

Your account page where I am logged in, I cannot view the price of the order on the white bar change this or different color font.

Maybe show how much I have spent in total and how much more to get the vip membership.