Agencies often base their service fee on the complexity of the campaign, number of influencers involved, and the volume of content required. They may charge a flat fee, a percentage of total spend, or a hybrid model combining both. Experience, reputation, and results (ROI) can also influence pricing. A transparent agency will show how these calculations are made. https://bizistech.com/transparent-amazon-agency-pricing-from-a-leading-influencer-marketing-agency/