Update packager commercial use page for the LGPL

docs/packager/commercial-use.md

@@ -11,7 +11,9 @@ We are not lawyers. This page is not legal advice. If this is important, talk to
 
 We won't comment on whether this is a good idea or not, but if you have the rights to all the costumes, sounds, and scripts inside the project you package, it is *possible* to sell it.
 
-The open source components of Scratch and TurboWarp used by the packager are available under permissive open source licenses that allow you to use, modify, distribute, and sell your projects with almost no restrictions. There are no license fees and no royalties. It is also worthwhile to note that these licenses explicitly do not offer a warranty of any kind; the authors are not responsible for damage caused by things like bugs.
+The open source components of Scratch and TurboWarp used by the packager are available under open source licenses that allow you to use, modify, distribute, and sell your projects without license fees or royalties. It is also worthwhile to note that these licenses explicitly do not offer a warranty of any kind, so can't be held responsible for damage caused by things like bugs.
+
+The TurboWarp Packager itself and some of our extensions use the [GNU Lesser General Public License version 3](https://www.gnu.org/licenses/lgpl-3.0.en.html). Grossly simplified, this means that if you modify the packager or runtime itself, you must share that code under the same license. This license does NOT require you to share the source code for the projects you package.
 
 If you used costumes, sounds, or scripts created by other people, make sure you have permission from these people to sell their work. Most things you find on the Scratch website are supposed to be available under the [CC BY-SA 2.0](https://creativecommons.org/licenses/by-sa/2.0/) license which technically doesn't prevent you from re-selling the work, but it requires attribution and the share-alike clause may have significant license implications on the rest of your project. Project creators can grant you additional permissions on top of the CC BY-SA 2.0 if they choose.