Can a user redistribute pay-only GPL derivative? and more...

[Ethan Piliavin]

Hi,

 

I have been studying the GPL and trying to understand it, and it seems like
someone here might be able to clarify a few things for me, and perhaps
answer a question. If this is not the correct place, I apologize, can
someone point me to a better one?

 

Bombs away:

 

1)      Am I correct in understanding that: Under GPL, one can release a
derivative work of another GPL'd project, as long as it is also under GPL,
and the second party can even charge for the derivative work (and only send
sources and/or binary after payment).

2)       If the above statement is true, can a third party now use the
source code provided by the second party (that charges) and create a new
(double derived!?) program and sell or give it away (under GPL)? Is there
any obligation from the third to the second party once the transaction is
complete (other than GPL)?

3)      Would there be any legal implications / gpl problems / copyright
violations in a case where a user redistributes a GPL'd program+code that
the original author charges for?

4)      Is there any difference for interpreted script programs (ala PHP)
where the source essentially is the program?

 

Thanks for taking some time for me!

 

Ethan

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