Korean messaging service Line, which we featured in our Messaging Whitepaper, announced a new partnership with singer PSY to offer free stickers in exchange for viewing his new single on YouTube. It’s a unique marketing strategy to boost YouTube numbers for PSY, whose continued YouTube success is integral to his career in the West. Pushing Line users to the video will certainly do just that, as the messaging service’s massive userbase is enough to push the video towards virality on its own.