GPL never says you can't charge for software.
As for immorality, you can read the justifications here starting from item 4 (Voices from the Revolution): https://www.drdobbs.com/the-ethics-of-free-software/18441458...
As for immorality, you can read the justifications here starting from item 4 (Voices from the Revolution): https://www.drdobbs.com/the-ethics-of-free-software/18441458...
> GPL never says you can't charge for software.
There is a quote in item 4 at that link you shared, which says:
> I think that to try to own knowledge, to try to
> control whether people are allowed to use it, or
> to try to stop other people from sharing it, is
> sabotage.
The only thing you're not allowed to do is do a change and "close" it.
It's like you're begrudging freedom fighters their actions because they are violating the feudal rights of their historical oppressors.