Arbitron has lost a couple dozen smaller markets in the past three or four years, mostly due to the advertising recession. Two or three big problems. One, the whole ad industry dropped around 30 percent in revenue, but Arbitron wouldn't budge on their annual price increases. Secondly, national and regional business--the main reason for having Arbitron in small markets--collapsed. And thirdly, Arbitron is making so much money off the PPM markets that they really don't give a good shit about small diary markets anymore--they wish they would all just go away.
It is a case of a monopoly acting in the worst monopolistic fashion: "We don't care if radio income has crashed. Your price is going up because we say it's going up, and if you don't like it, you can leave."
So a lot of markets did, including Rocky Mount.