Subscription billing can be fairly simple and straightforward: charge X for a trial period, then charge Y for a subscription that renews every 30 (or however many) days. But, what if you want more flexibility? What if you want to offer different combinations of access, perhaps involving many products or options, a la carte style? What if you want to vary your offers periodically to find which ones work best? If you are a tech-savvy merchant that would like more freedom and flexibility to vary your offers, Dynamic Recurring Billing might be right for you.