Jockey advertisements worn during the Preakness Stakes (gr. I) telecast on NBC received little "exposure time," a sports marketing firm's analysis has concluded.According to Michigan-based Joyce Julius & Associates, only two brands received clear exposure during the telecast -- TrimSpa and Wrangler. The exposure lasted for 21 seconds and was worth $85,000, Washington Business Journal reports. It has not been revealed how much jockeys were paid for wearing ads in the Preakness.Exposure value is calculated by comparing the amount of time a sponsor's logo appears to the cost of commercial time for the broadcast.In the Kentucky Derby (gr. I), five jockey sponsors received exposure tine worth in excess of $550,000, Joyce Julius & Associates calculated. Winning jockey Stewart Elliott did not wear an ad during the Preakness. If a company had placed a logo on his breeches and neckwear the 2:37 of air time would have been worth more than $600,000.