How much does Swarm data cost?

Could you please elaborate on the pricing structure for Swarm data? Is there a fixed cost per unit of data, or does it vary based on factors such as the type of data, the volume of data, or the frequency of access? Additionally, are there any discounts or promotions available for bulk purchases or long-term contracts? Understanding the cost of Swarm data is crucial for businesses and individuals looking to leverage this technology for their needs.