That's a goodbye for anyone wanting to build anything interesting in the future with it. Such a pity. I couldn't find anywhere any kind of "commercial license".
I do a lot of Open Source, so I know the troubles associated with GPL and the like. This is a lot more extreme than that.
If you were to make a tool based on this a lot of your potential userbase dissapears. Like most of the people.
Why? For using it, while I mostly use Open Source, learning/mastering a tool only to discard it and then learn/master a different tool that does the same for a commercial application is a HUGE waste of time.
If there was a way (2 licenses) to use this as commercial software then it'd be a different story.
PS: I'm the author of legally and I made it for this reason: https://npmjs.com/package/legally