The Commercial Opt-Out API is structured as an annual plan with a fixed included volume. A Growth plan, for example, includes up to 60,000 requests at the discounted rate for the year. Once that annual allowance is used, additional usage continues through a prepaid balance at the same plan rate, and the account can be replenished automatically when funds run low. If you reach the annual included volume before the end of the term, you may select a new plan at the same or a different level for continued service.