You can use the
credits provided with the subscribed subscription plan for the entire duration
of its validity.
Credits not used during the validity period of the
subscription will be lost; they will not be cumulative, transferable, or
refundable.
If you have subscribed to a subscription and have used up the credits provided
with your subscription plan, you can choose to supplement it with the purchase
of credit-only packages (On-Demand). Credits purchased in on-demand mode and
not used during the validity period of the service subscription will be lost;
they will not be cumulative, transferable, or refundable.