Comment by jasomill

While it's true that this the kind of "source available" license the article is talking about, other examples exist.

For instance, the source code to Epic's Unreal Engine[1] is hosted in a private GitHub repo, accessible by anyone who agrees to a clickthrough license, and free for personal, educational, and commercial use up to $1 million gross revenue, at which point royalty payments are required.

[1] https://www.unrealengine.com/