On Influence4You, you don't need a minimum number of followers to sign up. You can participate in campaigns starting from 0 followers for consumer reviews, affiliate, or user-generated content (UGC) campaigns.
For paid campaigns and product giveaways, brands themselves set the minimum number of followers required to participate in their campaigns based on their communication objectives and desired visibility.
The minimum number of followers is often set from 1000, 3000, or 5000 followers depending on the brand.