The End User License Agreement (EULA) for Mathematica explicitly prohibits:
Log in to your Wolfram Account to view all registered products and their associated activation keys. mathematica 9 activation key generator
Mathematica 9 is a commercial software that requires activation to function fully. Without a valid activation key, users can only use the software in a limited capacity, with many features disabled. By obtaining an activation key, users can: The End User License Agreement (EULA) for Mathematica
Official activation keys are 14-character codes in the format XXXX-XXXX-XXXXXX Wolfram User Portal: Log in to your Wolfram Account to view keys for products you own. Site Licenses: they face functional limitations:
Even if a user successfully bypasses activation for Mathematica 9, they face functional limitations: