Opt-in influencers generate earned influence for a brand. When an influencer opts in they are choosing to talk about and post about a brand without monetary gain or free products. They are simply promoting the brand because they are passionate about it and want to share it with their followers. Experts on the ExpertVoice platform most often fall under this category. They promote a brands because they love it and it works for them, not because they're being paid to do so.