You can check user referrals at the event dashboard under promote tab. 

• Go to the event dashboard.
• Click on "Promote" at the left toolbar.
• Click on "Ticket Grouping".
• Then click on the group name of which user referral data you want to see.

• After clicking, copy the group link and open that link in the new tab.

• After opening, you will see the referral dashboard where all the users' name and their referral link will be visible.

• Now to see the referral data of the specific user, click on the plus icon on the left side of the user.

• Here you see the total link visits and RSVP confirmed by the specific user link. Through this, you can track each users performance.

• Here you can view RSVPs confirmed , number of visits to your event site etc. besides the user name.