8. The system of claim 7 , wherein the one or more computers are further configured to perform operations comprising: receiving new content for the underserved topic; determining that the new content increases the topic corpus quality measure for the underserved topic; and compensating a provider of the new content based on the increase to the relative topic corpus quality measure.
8. The system of claim 7 , wherein the one or more computers are further configured to perform operations comprising: receiving new content for the underserved topic; determining that the new content increases the topic corpus quality measure for the underserved topic; and compensating a provider of the new content based on the increase to the relative topic corpus quality measure. 10. The system of claim 8 , wherein the one or more computers are further configured to perform operations comprising determining a value of the compensation to the provider, the value of the compensation being determined based on a demand for the underserved topic and the topic corpus quality measure of the underserved topic.