$10k/1742 = $5.74. This is what they've priced each Gaytime at. Maybe they are accounting for future price hikes/inflation, but this seems more expensive than buying at a servo.
You would be better off taking the cash, waiting for the next half-price 4 pack deal ($4.25/4 = $1.0625 each) and buying 436 boxes for $1853. You should probably want to take them out of the box to save storage space. Each box of 4 says 400ml, lets call it half a litre for packaging for a total volume ~218L. Use the remaining cash to buy a chest freezer. That's 719L for $749 which should be very comfortable, maybe you could keep them in boxes after all.
That's a "lifetime" supply for $2602, netting you a $7398 profit minus refrigeration costs, which can be offset by putting more of your leftovers in the freezer and reducing food waste. Plus you might have noticed that the cost of Gaytimes is actually slightly high. This is because 1742 is not divisible by 4, so you would have bought 2 extra icecream in all those boxes. Which means that not only do you still come out ahead financially, but you have 2 spare Gaytimes to share. Score!
I also just noticed that they actually priced the ice creams at RRP of $3.40 each with a clearly stated value of $5922.80. Which means that there are no accounting tricks or anything, and they really are asking people to choose between $10k cash or less than $6k of ice cream. Which is absurd.
Why would anyone choose to receive the lifetime supply of Golden Gaytimes valued at <$6k?