But I'm curious how this is actually achieved. The key in such a system would be keeping users engaged in the site from the time they first start learning to the point that they are ready and qualified to get their first job. This is likely six months to a year of training (at the low end) and it can't just be 1)learn the basics of javascript 2)learn the basics of html css 3)learn the basics of python.
New programmers with an eye for getting to their first programming job asap are better off building a portfolio that shows that they can work in the full stack and get stuff done. Or alternatively with in the confines of Codecademy if you're not going to have a deep portfolio, showing a mastery of the full stack with deep knowledge or maybe one platform (say deep understanding of javascript and the fundamentals of CS).
I'm curious how Codecademy plans to bridge this divid or if they have other plans in mind (which they probably aren't as willing to share with the masses)