Digital media and entertainment company AOL Inc reported better-than-expected quarterly revenue, helped by a 60 percent jump in advertising revenue in its third-party platform. AOL, whose shares were up nearly 4 percent in premarket trading, also said it approved a $150 million share buyback program. Advertising has become a major revenue stream for AOL, the owner of the Huffington Post news website and the TechCrunch blog, especially as the company moves away from dial-up subscription service.