My point is that the quantities that are consumed per serving are small and so it's the absolute costs that are more important than the relative difference.
Sure, but I think you have to consider how most people shop: if they see the bottle of maple syrup as 3 times the cost of its competitor, that's the comparison they see, especially if they have no strong emotional connection to maple syrup itself. Could they make the stretch if they wanted to? I'm sure they could, but I imagine there's a hundred other competing groceries that win out when the primary caretaker is grocery shopping. Should they opt for the name brand cereal or the store brand? Detergent? Juice? I don't think most of those grocery item comparisons are as stark as a three-fold difference, so I can appreciate that maple syrup may not make the cut for many people - even if the difference is not all that much in dollar terms.