It’s not about being messy or being neat – although one of these looks a lot better when the customers walk up.
It’s about putting items at optimal heights for when a customer or an employee has to lift the items. Notice that the firewood on the right is stacked on not one but two pallets. This helps bring the bags of firewood to a more optimal initial lift position than trying to pick the firewood up off of the ground.
The power zone for lifting starts at just above knee height, which is about where the handle is located on the lowermost bundles of firewood in the image on the right. Without those two pallets as a base, the firewood would be picked up from a less than optimal height (although, with some bending at the knees we can make it a much better and safer lift).
The firewood in the image to the left has two problems. The first is that the lower levels of firewood are stored on the ground in bags that tend to spread in a horizontal fashion, reducing the overall height of the bag. The second is that these bags don’t have regular handles on the top which can mean that the handle is actually on the level of the ground. The use of a spare pallet or two and some reorganizing of the bags so that they stand with the handle portion of the bag in a vertical orientation could make this “retail display” a little easier on the backs of the employees and the customers.