Once you have identified the influencers who match your criteria, you need to offer them a fair and flexible revenue split that reflects their value and your budget. A common way to do this is to use a commission-based model, where you pay the influencer a percentage of the sales they generate through their referral links or codes. This way, both parties have an incentive to maximize the results and share the risks and rewards. However, you can also consider other factors, such as the influencer's fixed costs, the duration and scope of the campaign, the exclusivity and frequency of the promotion, and the potential for long-term collaboration. You can use tools like Impact, PartnerStack, or Refersion to track and manage the revenue split.