Content exchanges allow businesses to attract, engage, and convert buyers by providing targeted and personalized content from many different sources through an automated system that tracks digital rights, optimizes budgets, and settles payments between buyers and sellers of content. Content exchanges gather content from various sources, classify it by topic and tags, select and curate content for each user based on their profile, and measure engagement by tracking clicks on article summaries to optimize the selection of content. Behind the scenes, content exchanges manage digital rights, account for the content in the system, optimize budgets to maximize impact, and issue payments to content providers on a regular basis.