As someone who loathes subscription models (for JJ, they’d require a time investment too to adapt the subscription etc), I prefer to just order a big 6 month supply and finish it in my own time. Considering this saves on shipping and packaging costs (1 big box versus 3 tot 6 smaller boxes for monthly or bimonthly deliveries), it would make sense that a volume discount should be applied. Huel for instance has both a subscription discount and a volume discount that takes this into account.
Don’t know if others feel this way about subscriptions, but I’m guessing I can’t be alone.
I would make use of such a feature too because of inflexible delivery options where I live. But jumping through the subscription hoops every 6 months is only a small hassle. You know you can cancel the subscription and it only takes a few minutes, right?
A bigger improvement for those who prefer large orders would be better visibility to expiration dates currently being sold. They won’t share that info even if you mail them.