Photo and video sharing app Snapchat is expanding its Discover publisher platform with three new channels: tech and culture news site Mashable, gaming news site IGN, and YouTube food and travel video network Tastemade. These publishers join brands such as BuzzFeed, CNN, Comedy Central, ESPN and Vice Media for a total of 15 Discover channels. “Though still in an early phase, Discover is key to Snapchat’s plans to monetize its app, which began with disappearing photos but has since expanded into semi-permanent content,” notes The Hollywood Reporter. “Last year, prior to the launch of Discover, Snapchat was making very little money, which is common among early-stage technology startups.”