Various aspects and embodiments are related to an information retrieval and information sourcing architecture. The information retrieval and sourcing architecture can be implemented in a real estate setting. For example, the architecture can be implemented in the real estate setting to provide intuitive search results dynamically ranked according to user model personalizations. Dynamic recommendations can be generated within any environment (e.g., real estate information environment). Additionally, recommendations can be dynamically provided to a user in the form of search results outside the requested results set —and these expansions/recommendations can be based on likely engagement of the user with the results. Likely engagement can be determined by a search system based on profiling (even anonymous users) and matching user models to the current user. The system can execute discovery operations which feed search results proven engaging to other users or have a likelihood of favorable engagement based on user modeling.