If you think of it as social computation, then yes as the diversity and novelty of the computation increases, it may have a positive impact Steemit. If Steemit is a game, positive impact could be measured in how fun it is, and this could be measured by looking at engagement statistics to track stickiness. If it's a social computer then you would look at the value of the computations produced, how high quality is the curation, and how interesting is the content?

If Steemit is a social computer which resembled a game, it might just work. If it's another social media platform, there are already a lot of these.