You assume the alternative is buying more. What if the alternative is buying twice a week but based on a different metric? Or buying less?
In general it's better to be accurate about cause and effect and then choose what to do. That way you can make sure the way you're measuring "good" is real.
In general it's better to be accurate about cause and effect and then choose what to do. That way you can make sure the way you're measuring "good" is real.