For twenty years Mid-Ohio was the most attended race in the series, but the year of the season final debacle, attendance started falling. Started nose diving after DMG bought the rights, and attendance has just not been the same. In the past, the race was promoted (radio advertisements, bill boards, local news plugs). There has been nothing like that for the last 5-8 years. They really need a big money sponsor (like honda was in the past). DMG drove Honda and Kawasaki out of the series, and the two of them accounted for some major dollars for many of the rounds. The economy in the rust belt has been bad, but I think DMG and the lack of advertisement have had more to do with this than anything else.