Odoo v16

Regarding the instructions for setting up commissions: www.odoo.com/forum/help-1/how-do-i-setup-commissions-in-odoo-226633, I see this is tied to a Salesperson in the CRM.   

Is there a way to create commissions for ecommerce website customers?  I see there is a refer and earn - https://apps.odoo.com/apps/modules/16.0/refer_friend_and_earn/ - (which breaks some UI automation when adding items to cart), which adds loyalty points for referrals.  

I would like to setup commissions for UGC creators, but they don't necessarily need a system account, which would mean paying for an additional Odoo seat, correct?