Tracking contributions made by people one refers

[#1]

Many people enter a lot of data when their first join Jigsaw.  After a while though, they run out of new data to contribute - they have used up all their resources.

However, when referring new members, the person responsible for the referral is helping to generate new data for Jigsaw, as well as new people who may contribute by updating a lot of companies or contacts.

Can there be a way to track the contributions made by people who you referred?  In my case, I added 34k contacts to Jigsaw, but have made 1700 new referrals.  How many contributions have these folks made.  How many are rainmakers now?  Any Data Defenders?  Any win the update contests?

Right now there is no way for me to find this information.  Could there be a field added to each member: "referred by" so that we could look into that information.  Later Jigsaw might consider tracking that information in some manner as well.