In the Affiliate Plugin Usage section it says, "The Affiliates plugin is very powerful out of the box, integrating with many WPMU DEV plugins. But you can also with only a few lines of code integrate with other WordPress plugin’s or setups. Checkout our basic tutorial on creating your own custom integration."
Going to the referenced article at https://premium.wpmudev.org/blog/integrating-the-affiliate-plugin-part-one/, the instructions are all about using the WPMU system, the Supporter paid option, etc., and has nothing for integrating with a different solution.
I am wanting to have an affiliate program using the Paid Memberships Pro (http://www.paidmembershipspro.com/) because it allows the Stripe payment method, which WPMU Membership does not allow. Is there any place online with actual custom integration instructions?