Web Developers: The best way to learn Defensive Security

Recently we started CTF365 which is a “Security Training Platform for IT industry” with a focus on Security Professionals, System Administrators and Web Developers that implements CTF (Capture The Flag) concepts and leverages gamification mechanics to improve retention rate and speed up the learning/training curve.

We did created an internet alike environment (domains registration included) to make it look like the real Internet where users can build their own servers and attack others while defend their own.

It is build such way that anyone can get Brute Force, SQLi, Deface, Take Over, CSFR, RCE and so on without any restriction.

What I discovered is that Information Security Professionals are an apart breed that can crack your setup but they can rarely build an awesome setup full of web apps as a web developer/designer would do.

My questions is:

Would CTF365 be a great opportunity for web developers to learn and improve their Defensive Security? As a web developer/designer, would you use such platform to analyze and learn how hackers would attack your setup?