It doesn't need to be a contest to get huge amounts of press attention.
> obviously a joke
They decided to alter the campaign to make it look less like a joke, because that would market better. Imagine the marketability if it wasn't a joke!
> Even by your logic: Do you also think there was only one pair of sunglasses? One duffel bag? So why one jet?
More expensive items have smaller stocks. Much more expensive items have much smaller stocks. Is this not obvious?
If something had to be equal between prizes types, I would expect it to be total value, not quantity.