Exactly. Voluntaryism is open to other philosophies as long as all human interaction is voluntary. It is live and let live. The same cannot be said for large swathes (almost the entire, I dare say) anarcho-communist community.
The crux of this piece was basically around that concept, that ANARCHY doesn't require anyone to conform to any given economic model, and that those who are attempting to say it can't be real anarchy without their specific adjective are sort of missing the point.