I don't know what's worse, the existence of Vegemite ice cream or that people actually seem to buy it.
Or is this some form of natural selection?
Honestly, I think it's just if you grew up with eating it a lot. Especially as a baby, toddler, ect. It becomes a pleasurable flavour, of better times? Maybe?
What about...?

O_O
Do tell.
Never.
That Vegemite ice cream is so wrong....though I like how they put a bunch of Australian flags in it so we all know who to blame for the atrocity...
Honestly, It's not a common thing :/ I hadn't even heard of it until you posted the picture.
You know, if I got elected Senator I'd put forward a motion to draft a bill outlawing that garbage in the continental United States.
I could think of better garbage to throw out.
It is because you had NZ marmite, isn't it? 
Nope that's in the trash can too.