Nicholas Hunt/Getty ImagesThis story was delivered to BI Intelligence "Digital Media Briefing" subscribers. To learn more and subscribe, please click here. Ariana Huffington, the founder of Huffington Post, is leaving the digital publisher to focus on the launch of her upcoming health startup, Thrive Global. She founded Huffington Post in 2005 and remained at the company's helm following its acquisition by AOL in 2011 and through Verizon's subsequent purchase of AOL in 2015.