Abstract: A system and method are disclosed for harnessing user behavior. In an example, the system may include means for receiving event data messages from client devices, wherein an application is associated with an advertiser having a product catalog of products available for purchase; means for extracting a product identifier, wherein each of the product identifiers is associated with a product; means for searching a database using the product identifiers to determine whether an existing product profile has been created; means for generating and populating a new product profile with information derived from a corresponding event data message, for each of the product identifiers for which no existing product profile has been created, wherein the database stores the existing and new product profiles as a second product catalog that comprises at least a subset of a product catalog of the advertiser.