Contracts often have a clause stating that "all your code are belong to us (the company)". I would not write proprietary software (it is an unethical activity) and I had rather not have such a clause even if the software is free: the company could end up subjugating users with the code I wrote. Given the current job market for developers, it is possible to find jobs where you work on free (or custom) software while keeping your copyright.
By definition, anyone can turn permissively-licensed software into
proprietary software. Without asking anyone's permission. It happens all the
time. That is why we need the copyleft.
- [Trisquel-users] Re : Another free engine of a commercial Game: Seri... lcerf
