Affiliate Plugin - Home link confusing for users

We are starting to get more than one product on our system and having the default affiliate link for the home page displayed is confusing for our members.

A few have used it and obviously get no conversions as it's not pointing to the register / join page.

Then we also have a few products with the membership plugin.

As a suggestion, can a setting be added so that super admin can set what the default url is and then the users affiliate string gets added on automatically?

Example: I set my join link as http://domain.com/register then the system adds http://domain.com?ref=admin-63 automatically?