A new form of independent media agency/media trading desk that may or may not use its client’s money to buy media and audience data and charges a transparent cost-plus fee. A media market maker may use its own capital to buy media at its own risk seeking to resell this media to a buyer for a profit. With sufficient volume of transactions, a media market maker can be successful on thinner profit margins than most other market participants. The effect of this risk-bearing role is to significantly narrow the spread between what the advertiser pays for a given result and what publishers receive for delivering the ad opportunity. Moreover, the market making role of a media market maker ensures the likelihood of higher fill rates and eCPMs for publishers.