License agreement doesn't (legally) work out, as Github TOS Section D.5 allows any user to redistribute (display) content on the Github platform.

[xandaaah]

TL;DR: People have a legal right to redistribute it on Github.
Here's a quote from TOS Section D.5, paragraph 2: "you grant each User of GitHub a nonexclusive, worldwide license to use, display, and perform Your Content through the GitHub Service and to reproduce Your Content solely on GitHub as permitted through GitHub's functionality (for example, through forking)"

Possible solutions:

• Relicense under a different license, such as the GPL, which does allow commercial use, but requires people to keep their code under the GPL, and the GPL requires code to be open-source, so you can take code from a fork and integrate it into your project.
• Just remove the clause from the license agreement.