The actual situation here is more like: you're told you can have up to a gallon per day, but if you actually try to take a gallon every day, you're told that do

The actual situation here is more like: you're told you can have up to a gallon per day, but if you actually try to take a gallon every day, you're told that doing so is harming their operations, because you're taking up too much of the workers' time and forcing them to buy ingredients too frequently.