www.politicususa.com/2013/07/28/boycotters-win-cumulus-media-plans-dumping-rush-limbaugh-sean-hannity.html
"The main reason why Cumulus would even think of dumping Limbaugh and Hannity is that the boycott has made their shows much less profitable. Forty eight of the top 50 advertisers on Cumulus asked that their ads not be played on Limbaugh and Hannity’s shows."