Jon Stewart could cultivate a $100 million franchise in his post-"Daily Show" life, a media executive said Thursday. "There is a generation of fans who would follow Jon Stewart probably anywhere," said Ross Levinsohn, a former interim Yahoo CEO and current board member of Scout Media. A direct subscription service for Stewart content could generate $100 million annually, Levinsohn contended on CNBC's "Fast Money: Halftime Report." He calculated the sum from 1 million subscribers paying an $8 per month fee, plus advertising and other revenue streams. He noted that a Glenn Beck direct distribution model has garnered about 300,000 subscribers. Media companies have started to focus on "how to talk to millennials," Levinsohn said. With a loyal following of fans in their teens, 20s and 30s, Stewart and his brand of satire are invaluable, he said. Levinsohn noted, though, that Stewart will likely take some time off before jumping into another venture. Viacom-owned Comedy Central announced on Tuesday that Stewart would leave the popular news satire show that he has hosted for 17 years. The news followed comedian Stephen Colbert's departure from the network late last year. IN-DEPTHJon Stewart Leaving 'The Daily Show,' Comedy Central SaysEnd of an Era: Colbert Closes With Star-Studded SingalongStewart, Carell, Colbert Try to Break Internet With Topless Instagram- Jacob Pramuk, CNBC