For me, Codecademy was less engaging than Treehouse and Code School. They all offer different approaches to teaching different aspects of development through the browser, and I have thus far spent the least amount of time at Codecademy because I have felt that it doesn't offer as efficient of a learning experience.

That being said, it's still a good tool with potential, and they might just be worth whatever valuation this round was brought in at (I didn't see mention of it in the article). Best of luck to the team!