Perpetual Fallback License

For monthly subscriptions, 12 months of uninterrupted subscription payments qualify you for receiving a perpetual fallback license. 20% discount for uninterrupted subscription for 2nd year, 40% discount for uninterrupted subscription for 3rd year onwards.

All yearly subscriptions include a perpetual fallback license.

This applies to Extra Tools Pack, Extra Icons, Extra ToolWindow Colorful Icons, and Extra IDE Tweaks.

To understand how a perpetual fallback license works, please see this article from JetBrains.