There are detailed options for pre-funded incentive accounts inside your Ethnio account. You can allocate invoices to different team members, set limits, and track spending and lots more. All the settings live in account >> billing:
------ Now scroll wayyyyyy down to Active Invoices ------
Set Permissions Per Pre-Funded Invoice
Scroll way down to the Invoices section, and click edit next to any active incentives invoice:
Then choose which team members can spend money on a given invoice:
You can set limits for your team members who pay incentives using the same invoice, if you've pre-paid incentives via invoice. You can't set limits for team members if they are sharing your credit card. This is found under account >> billing, but only for the main account admin. Team accounts don't have access to this.
Advanced Option: Want team members to pay for their own incentives?
You can easily do that. They will be prompted to add their own Credit Card or pay via Invoice. Up to them. From account >> billing use this toggle: