You will receive $100 credits to spend within 30 days upon your first registration. When the credits are going to expire, you can extend the expiration by adding a payment method on the Zilliz Cloud UI. If you choose to add a credit card, the expiration of the credits will be extended to 1 year. If you choose Marketplace subscription as the payment method, the expiration of the credits will also be extended to 1 year and you will earn $100 extra credits whose expiration is also 1 year.