Much software moves to the web (software as a service, as a remotely ran web-application). The web is good as it makes many things possible that are not possible on the desktop. Still we think there should be Freedom on the Web.
The GPL, whether version 2 or 3 only grants Freedoms when one runs the software on one’s own machine. This is a problem on the web, as because of this there the GPL effectively is a BSD-style license from a normal user’s perspective.
So we do our best to create a Free Web. Where free means having Stallman's four freedoms on 3 levels.
These 12 (3 * 4) freedoms should guarantee that individuals, communities and sub-groups can always take their data, and the application(s) it needs, determine their collective future & practices, resp. have an exodus, and start a new community.
Also see our blog-post on this