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The second Share-Alike licensing option, CC-BY-NC-SA, which requires non-commercial use only is Share-Alike but is not free content (and not copyleft, according to some critics).
NC-SA is not copyleft because the presence of NonCommercial restrictions breaks copyleft. It removes rights, and even in the terminlogy of ShareAlike it does not Share Alike with the originally licencing author. Arguing that NonCommercial ShareAlike restores some rights, that copyleft is just reciprocal licencing, or that you are still sharing the work does cannot make NC-SA seem any more like copyleft. NC removes enough of copyleft from SA to no longer qualify as copyleft.
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