The OSS Watch team blog carried an assessment of the license under which edX recently released part of their code.  They surface an interesting nuance in the chosen license:

The EdX announcement is interesting for two reasons – firstly that they are the first high profile MOOC provider to release open source – and secondly that they are doing so under the AGPL, one of a small number of open source licenses that specifically address the “privacy loophole”. This means that if you create your own MOOC service using EdX’s XBlock software, you must make the source code for the service – include your modifications – available to download under the AGPL. This is a form of “service provider copyleft” that ensures that EdX will have access to any improvements on their platform used by third parties.

This can be seen as a very cautious move – using the AGPL will ensure no other services can improve on the codebase without EdX getting access. However its also quite a bold one as it makes a clear distinction between how EdX sees “open” in contrast with Coursera, Udacity and others. (It remains to be seen what direction the UK’s FutureLearn initiative will take). It will also be interesting to see if other components of EdX will be released, and if so whether they will also use AGPL. Read more.