Is there a tracking system built into the Invite plugin

I want to reward subscribers who invite friends to register and subscribe.

Is there a way to track who was referred by whom, and how many referrals a person is able to make?

There is one plugin called "Affiliate Plus" that is supposed to do this, but it doesn't track properly and the developer site is flagged as dangerous, containing a trojan. The code seems to be reported as safe. The developers website is not.

Anyhoo, is there any plugin or functionality that will track referrals or invites?