A new release from BIA/Kelsey predicts “native” ad spend on social media sites to increase from 1.53 billion this year to 3.85 billion in 2016. For some reference, these native formats treat ads as any other piece of content, like a promoted tweet in your newsfeed. While we’ve seen much debate over their effectiveness, expect social ads to grow on platforms like Facebook, Tumblr, Foursquare and maybe new entrants like Tout and Pinterest.