YITH WooCommerce Affiliates is the plugin thanks to which you will have an actual affiliation system on your shop in a few steps. You can set a commission rate, unique or different for each affiliate. The payment can be done manually or automatically by delegating the procedure to PayPal.
By combining the use of these two plugins, you will be able to credit the commissions due to your users as funds, so that their balance increases.
After installing and activating both plugins, the option to pay commissions as funds will be added to the payment management of YITH WooCommerce Affiliates.
For further details about YITH WooCommerce Affiliates settings, please refer to the official documentation.