John Lee Dumas who runs EntrepreneurOnFire is very transparent with his monthly income and costs. His latest monthly income report: http://www.entrepreneuronf

John Lee Dumas who runs EntrepreneurOnFire is very transparent with his monthly income and costs. His latest monthly income report: http://www.entrepreneuronfire.com/income15/ http://www.entrepreneuronfire.com/income15/ And more info on sponsorships: http://www.entrepreneuronfire.com/sponsors/ http://www.entrepreneuronfire.com/sponsors/ According to the latter link he charges $18-25 per 1000 listeners. Should be noted that he produces daily podcasts. The CPM should really depend on your niche though.