How much does Aurora cost per year?

Inquiring minds want to know, "What is the annual cost associated with Aurora? Is there a subscription fee, maintenance cost, or perhaps a transaction fee that accumulates over the course of a year? For those looking to invest in or utilize Aurora for their financial needs, understanding the annual financial implications is crucial. Could you please elaborate on the various costs associated with Aurora and provide a general estimate of what it may cost per year?" This question aims to gain clarity on the financial aspect of Aurora and how it fits into an individual's or business's budget.