Special Affiliate Payouts
You can give an affiliate a special payout for referrals made to a specific site. Go to the Affiliates Admin, find an affiliate, and override them. Go to the Sites Admin, click the Configure Default Payouts and Enabled Options icon, find the join option and program, and click its edit icon. Change the options and Save.
Warning: note your change. If, later, you think an affiliate is being paid disproportionately, check your notes to see if you set a special payout.