Using WPMU affiliates plugin and want to know how affiliate gets credit on new user registeration

I need some help to set up WPMU affiliates plugin. One user has this URL(http://ngw.digital/wp-signup.php?ref=testbreezy-998). And when other users signup through this url 'Sign ups' count increases for this affiliate, as in screenshot you can see 'Signups count' for 'testbreezy' is 2. But I dont know how an affiliate will get 'Rewards' or 'Credit' when a new user register for an affiliate.