So it sounds like the salient aspect here isn't necessarily the type of data, but the manner in which that data is collected. Looks like compstak's success is a

So it sounds like the salient aspect here isn't necessarily the type of data, but the manner in which that data is collected. Looks like compstak's success is a result of creating a platform that facilitates crowdsourced data points that are difficult to acquire using traditional data collection approaches...that scarcity is what makes the data valuable, especially since that data can be used for leverage in a negotiation. Also, they appear to prop up the overall scarcity by only granting access of existing data to users who provide new data.[1] I'm curious how they figure out how much to charge companies for this data? And also how they stop real estate insiders from gaining access without sharing new data? [1] https://techcrunch.com/2012/10/18/compstak/ https://techcrunch.com/2012/10/18/compstak/