"Influencers" get paid per tweet or post, or work under contract on campaigns. Some get connected with companies covering multiple platforms, like theAudience, or specialty spots like Big Frame, CollectiveDigital, or Jukin Media, which focus on video creators. Then there’s twtMob for Twitter, theAmplify for Instagram, or HelloSociety for Pinterest. A startup called Niche gives you a customized group of social media "celebrities" who will organically tweet, post, and talk about your products. This isn't canned material made by some agency coming out these kids' mouths. It's them.