These are copy-pasted text blocks or .key files. JetBrains uses an online validation system. Once a single commercial or personal license key is detected running on multiple unique machines simultaneously, JetBrains permanently blacklists the code.
How to activate any JetBrains products with 3.jetbra.in? I found working domains: https://konstantinkop1.github.io/jet/ & https:// Activating JetBrains IDEs with an offline activation code
If you are a lead or regular contributor to an active non-commercial open-source project, you can apply for a free license. Requirement: