Last competition was run via https://beercartel.app.do/polls called https://beercartel.app.do/polls/win-valentine-s-dozen-brews/edit
It attracted 1,495 people of which 1,000 were new subscribers and $350 was spent. The competition was placed on the Brewquets Facebook page, blog - with repeating Instagram stories plus additional posts made to Facebook/Instagram with an email to the database.
All entries were then uploaded to Mailchimp.
A customer export was done from Shopify, then the customers that had entered (approx 160) were tagged with 2020 Valentine's Comp and re-uploaded with over write existing details ticked (all existing details were reuploaded).
Then all other competitors were uploaded to Shopify.
A Shopify Customer group was then created. This was done by filtering customers with the tag 2020 Valentine's Comp and saving the created group.
A voucher was then created that was only valid to those people in the 2020 Valentine's Comp.
https://www.competitions.com.au/
http://www.win-free-stuff.com.au/
https://www.ozbargain.com.au/node/add/competition
http://compingclub.com/index.php?action=calendar;sa=post
Others
http://www.prizewinner.com.au/advertise
http://australianmum.com/category/giveaways-2/
https://www.mouthsofmums.com.au/#CQBMdsbB6jHX8ubA.97
http://agentmysterycase.com/category/aussie-giveaway-linkup