Select your available payment methods, the chosen options will be displayed on your Affiliate account, they can only choose ONE from the available methods.
Be noted that if any of your affiliates haven't specified a payment method, you can't click Process Payment to pay them.
In case you pay your affiliate via PayPal, don't miss the PayPal integration instruction here.
As default, all payment methods will be applied to all programs, but in case you want to select specific methods to a specific program, there is an option for you:
On each method, click on the Configuration icon:
Then you can choose which program uses that payment method:
Then click Save and Save all your changes.