OCI supports BYOL and PAYG licensing.
BYOL offers perpetual (normal series and v-series) and annual subscription (s-series) licensing as opposed to PAYG, which is an hourly subscription available with marketplace-listed products. BYOL licenses are available for purchase from resellers or your distributors, and the publicly available price list, which is updated quarterly, lists prices. BYOL licensing provides the same ordering practice across all private and public clouds, no matter what the platform is. You must activate a license for the first time you access the instance from the GUI or CLI before you can start using various features.
PAYG FortiGate instances do not support the use of virtual domains (VDOMs). If you plan to use VDOMs, deploy BYOL instances instead.
PAYG and BYOL licensing and payment models are not interchangeable. For example, once you spin up a FortiGate-VM PAYG instance, you cannot inject a BYOL license on the same VM. Likewise, you cannot convert a FortiGate-VM BYOL instance to PAYG.
When using a FortiGate-VM on-demand instance prior to version 6.4.2, the FortiOS GUI may display expiry dates for FortiGuard services. However, these expiries are automatically extended for as long as the on-demand instance's lifespan. You do not need to be concerned about the expiry of FortiGuard services. For example, the following screenshot shows 2038/01/02.
FortiOS 6.4.2 and later versions do not display dates.