Update: Still in the process of making CC-SG licenses “live”
From Giorgos (CC-sg public project lead):
… in case anyone is wondering why the CC-SG licenses are not up yet, it’s because last-minute amendments are still being made to the licenses which are otherwise nearly ready to go. CC takes the release of new licenses very seriously and wants to ensure that they are as good and clear as humanly possible before they are up.
See previous update.