A great example of this is the Akinator app. The developers built up a database of answers by getting the users to fill in the missing data, which produced more accurate results and subsequently attracted more users. That feedback loop for apps like this seems like a very effective model. What I find interesting about this is that the value of the product, from a business perspective, comes from the success of the software in enabling that feedback loop, while from the user’s perspective, the value is in the data. But the data is emergent from the feedback algorithm.
