From the plain view of Test #3, spreading the rewards equally in between creators and curators is equivalent to saying the effort in content curating is equal to content creating.

Not so sure about this on Steem but I would say this place is more content-driven that author is the one who deliver the main content in a single post. If Steem's next Hivemind could make it more like the Reddit whereby the comment usually is the better content, then probably this 50%/50% will make more sense to me.