“Top pundits” are saying that 2015 will be the year that messaging apps become “the new social media.” Chat app Line, which we said could be one of the next big things in tech, has been forging new partnerships that show how important chat marketing could be for brands. Paul McCartney’s new single with Kanye West was offered free to those who follow him on the app, where he has more than 10 million fans. Those users got both a private chat from McCartney and a public post announcing the song’s availability, along with a link to download. (TechCrunch)