Dreamworld are currently running a promotion where everybody can purchase 12 months of access for the same price as a 3 day ticket.
If you purchase through ExperienceOz you have 6 months to redeem the ticket before your 12 months start. (Direct Purchases start immediately).
You can also get further discount on this through Optus Perks ($101.15), NRMA ect.
QLD and Northern NSW residents can purchase a Locals Pass through ExperienceOz too, this includes additional benefits and a Photo Pass for the same price. (Direct purchases no longer include Photos).