Comment by deng

Yeah, I did not get that either. I also do not understand why the GPLv3 would necessitate a contributor agreement, but MIT would not. I always thought those agreements were necessary so that one institution has copyright and can change the license without getting approval from every author. That applies to any free license, doesn't it? Anyway, I think they just wanted to change to MIT before new authors commit without an CA, after which they cannot change it so easily.