I'll try another rewording: "GPL is a license designed so that, no matter how many times people alter your code, a user that gets the program also gets the sour

I'll try another rewording: "GPL is a license designed so that, no matter how many times people alter your code, a user that gets the program also gets the source code. To do that, it forbids developers from using your code in some contexts." better ? (sure, there is a tradeoff between comprehensibility and precision ...)