Our average influencer follower count in our community is 2,500. We have a floor follower count of 100 followers and we do not have a ceiling. However since influencers are predominately compensated with just products for their promotions the majority of influencers willing to participate in our campaigns without payment have less than 20,000 followers.
The reason we allow influencers to participate in our campaigns with as low as 100 followers is because we care more about engagement rates than follower counts. All social platforms have now changed to only show posts to followers who engage with your content instead of your entire follower base. Due to those changes, influencers with only a few hundred followers can now get better engagement rates than influencers with tens of thousands of followers.