Scour is a social search engine that sources its search results from Google, Yahoo, and MSN. In addition, it incorporates a Digg-like functionality for users to interact with the search results, as well as a commenting feature. Scour then uses the feedback information from user participation in the search results to generate new rankings for the results. Through this user engagement with the search results, more optimized search results can be achieved. Furthermore, you can also earn some income through searching via Scour — you can exchange 6500 points for $25.