Once expired, you must purchase a commercial license or the panel will become restricted. 2. Developer Edition (Restricted)
Let’s separate the myth from the reality.
Developers can sometimes access a "Developer Edition" license, which is often limited to a very small number of domains (usually 1-3).
Most websites claiming to offer a free Plesk licence key are actually:
Using pirated software can lead to your hosting provider suspending your account or even legal action. Summary of Plesk License Tiers