Logged in to my Hoyts account and noticed that regular combos (including a regular popcorn and soft drink) are currently 1,600 Hoyts Rewards points. Not sure if it's on sale or a pricing error. Successfully added it to an upcoming booking - see a screenshot here.
The same combo usually costs 5,000 or 6,000 points online. My booking says I am 'saving $17.60' with this redemption. For comparison, a small combo is usually 4,000-5,000 pts, so you're getting more overpriced candy bar goodies for much fewer points.
Note that it should be the same price if you add this combo to ticket purchases online. This is refundable should you choose to cancel the booking up to 30 min prior to showtime. If you buy the combo standalone (i.e. through this link, then it's not refundable).
No idea if the pricing is the same in-store. Don't forget to stack with free popcorn refills for Hoyts Rewards members.