CSIRO Total Wellbeing Diet is currently running a special offer whereby if you successfully complete 12 month program, they will refund all membership fees for 12 weeks ($199 for regular program, $299 for premium program).
This is a fairly good deal if you think you can complete the program over 12 weeks. Full details on eligibility criterion are on the below page: https://www.totalwellbeingdiet.com/au/pricing/refundable-membership-fees/
Sign up here: https://www.totalwellbeingdiet.com/au/