Came across this deal on a Facebook ad.
Referrals also get an incentive.
Each referring member will be entitled to $100 cashback for each new eligible membership they refer once the eligible member becomes a member of CBHS Health Fund during the promotion period.
Each new eligible member will be entitled to $200 cashback when they purchase an eligible couple, single parent or family policy or $100 cashback for an eligible single policy. New eligible member must join on both hospital and extras cover. Promotion ends 31 October 2016. Cashback paid to nominated bank account no later than four months after promotion period ends. Eligible policy must be current and paid up-to-date for a period of 3 months after the promotion period ends.
Might be worth mentioning that you have to either be a current or ex-CBA Group employee - or you have to have a family member who does work for CBA or has worked for CBA.
CBHS is a good fund, but not open to all people.