I run a subscription business through mail myself, and I love your posts.<p>Have you tried to run introduction offers? 50% off for first shipment for example? If I were you I would try to put the countdown for the next shipment on top of your site. Thats a really powerful psychological factor.<p>Your CTA is also a little unclear, why do I need to first get an email, then a link? The buy process should be straight forward, not through my email. And if you have a really good reason for doing it this way, you should atleast tell me why I need to leave my email.<p>I really like the cartoon that explains the process. Very good.<p>Regarding packaging design, we did a huge remake in 2013. We increased our prices with 30%, and redesigned packaging completely. Doubled our LTV, insane gains. Just keep testing, but try to change provider for carton. We pay $0,1 USD for bigger cartons then yours, in one of the most expensive countries in the world. (With plastic window for address field) We chose to put our three USP on the back of the shipment box, to remind your customers every time they receive a shipment why they subscribed in the first place.<p>Keep testing!