licensing - 您是否需要为 "for sale"的 GNU GPL 软件付费？

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我在网站上看到过一些软件(准确地说是 Joomla 组件)出售。该网站说它是根据 GNU GPL2 获得许可的。但是，它还表示您需要为使用该软件的每个站点付费(批量折扣)。

我知道在 GPL 下销售软件是完全可以接受的，但是 license意味着源代码必须免费分发。

那么这是对 GPL 的合法使用，还是违反了许可证？免费下载该软件(例如从 Bittorrent 下载)并按我的意愿使用它是否合法？

Answer 1

这是一个 FAQ from the GNU site .我认为它回答了你的问题:

Does the GPL allow me to sell copies of the program for money?

Yes, the GPL allows everyone to do this. The right to sell copies is part of the definition of free software. Except in one special situation, there is no limit on what price you can charge. (The one exception is the required written offer to provide source code that must accompany binary-only release.)

http://www.gnu.org/licenses/gpl-faq.html#DoesTheGPLAllowMoney

此外:

If I distribute GPL'd software for a fee, am I required to also make it available to the public without a charge?

No. However, if someone pays your fee and gets a copy, the GPL gives them the freedom to release it to the public, with or without a fee. For example, someone could pay your fee, and then put her copy on a web site for the general public.