Multiple entries permitted if an entrant enters via Instagram, subject to the following:
(a) each entry via Instagram must include a different friend tag; and
(b) each friend can only be tagged by the same entrant once in the Promotional Post on Instagram.
Only one (1) entry via Facebook permitted per person.
If anyone who has already entered, it appears there is an extra entry option via https://www.betterbeer.com.au/pages/bottlemart-x-better-beer…
It's possible you can enter on Facebook also if you don't have an instagram account.