Z:gnu-www-ja-pirate-party--ce01dd-Proprietary software is restri/en

Proprietary software is restricted by EULAs, not just by copyright, and the users don't have the source code. Even if copyright permits noncommercial sharing, the EULA may forbid it. In addition, the users, not having the source code, do not control what the program does when they run it. To run such a program is to surrender your freedom and give the developer control over you.