The effort was in part seen as a handholding exercise on the part of the open source community for some of the larger corporate members. Institutional inertia being what it is, and factors above contributing, there was some frustration in the movement or lack on the part of some members. - Convergence. Despite some degree of internal conflict, the final nail was really the result of independent external resolution of many of the issues we had sought to address. Apple's own licensing has changed within the past month, I still need to review the changes. A fourth general class of license remains what I refer to as the corporate licenses.
Terms vary, some widely.
My basic concern is Open Source project patent infringement. Good questions, all. See the MozPL for some of the better language, and the IBM PL for what is an interesting take from a large patent-holding company. Raph Levien's licensing of 16 patents held by him on various graphics-related technologies.