It makes sense to offer subscription options for products that either constantly run out (pet food, water, toiletries, etc.) or every so often come in new editions (magazines, subscription boxes, collectibles, etc.). For one, it saves customers the inconvenience of going through the buying process again and again and, most importantly, it saves them from switching to a different store in between purchases.
Within Zen Cart Subscriptions & Recurring Payments module we have assembled all of the tools you'll need to implement subscription options at your store. You are given full control over defining the period of subscription, the size of payment, and the way new functions interact with native Magento functionality.
Once the payment charged, a new order will be automatically create and you can process the orders as normally in your admin panel.