Today, the company is launching a somewhat similar (but hosted) service for any developer who wants to keep an npm module private. The concept is similar to how GitHub monetizes its service besides its enterprise offering. Just like on GitHub, projects in the npm repository are public by default. For $7 per month, developers can now keep their modules private and share access with other users who also pay for the service.

http://techcrunch.com/2015/04/14/popular-javascript-package-manager-npm-raises-8m-launches-private-modules/?utm_source=javascriptweekly&utm_medium=email