[mannerheim]

Since the Wiki part isn't a license itself, I would think there isn't legal relevance to it, but given that the author doesn't seem to be a native English speaker, a generous interpretation might be that a commercial user could still fork this; it's 'required' in the sense that you have to pay for the convenience of having it available on NPM, which the author disallows you from making trivial changes to and republishing on there.

That's unlikely to be legally enforceable on NPM, but they might honour takedowns anyway.