CBS: NCAA webcast ad revenue to double

CBS's webcast of the NCAA basketball tournament will produce as much as 25 million in ad sales, more than double last year. The March Madness on Demand  webcast could reportedly produce a profit of 18 million, according to a spokesman for CBS. The network will offer all 63 games online over three weeks, with advertising from companies including State Farm Insurance and Marriott.

The NCAA tournament starts 3/20. This is the third year the network has aired a free, ad-supported webcast of March Madness on sites including CBSSports.com and NCAA.com.