Why not index and present Sushikartan's hard earned relevant information and reward them. Perhaps with something like content revenue for click through traffic from the search results page. This would benefit Google's search results by producing the relevant and local aspect of a review. If Google had ad placements on the destination site the concept of content revenue could pay a better rate.

As an aside I expected to see some form of ad placement on the Sushikartan site that would help support my concept. No such luck. Not sure how it generates revenue.