GoAffPro provides you with the option to add additional signup fields to the signup page.
To add additional signup fields to the signup page, go to the Signup page section in the Look and Feel tab of the GoAffPro admin panel.
Here, click on Select & Customize.
This will open up the signup page section.
Here, check the signup field.
Now, click on Save.
After this, the signup field will appear on the signup page of the affiliate portal.