I don&#x27;t think adding a GPLv3 dual to an MIT license changes much. You can derive a work from MIT licensed code and license your work with a more restrictive license. You would still need to reproduce the MIT license alongside your GPLv3 license which would be confusing.<p>The author is giving you the option to omit the MIT text and have a pure GPLv3 if you wish to restrict access to your software in that way.