Personal data, like demographics and preferences, as well as more specialized datasets, like consumer behavior patterns or market research findings, are among the kinds of data that can beposh rummy sold. The idea behind data-selling apps is that people have useful information that can help others. For example, a user's shopping habits or preferences may provide them with insights into consumer trends that a retail company could find extremely valuable. Users can use these applications to make money off of the experiences and interactions they have on a daily basis.