At least, I'm hoping that's what they meant. If they really meant horizontal and vertical in the way they used it then I've got no idea either.
"Plus, a horizontal fridge is just… convenient. You can’t even put things on top of a vertical fridge."
Don't they mean a horizontal fridge is a chest fridge? Which would make it sound like they want their whole comment to be in support of a chest fridge? Which is why none of it makes any sense to me.