En:If I offer GPL'd software for a fee, do I need to offer it for free to the public?

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Question: If I offer GPL'd software for a fee, do I need to offer it for free to the public?

Answer:

No.

If, on the other hand, somebody pays your fee and gets a copy, the GPL allows that person to publish his/her copy - for a fee or even free of charge. So it's perfectly legal to buy a copy of that program from you and publish it on a webpage without charging for it.