How can I track the number of friends an entrant invites?

Right now only Premium and White Label Campaign customers can track the number of friends an entrant invites. If you are a Premium Customer, you should be able to find the number of friends each entrant invites by looking in the "Leads" section. There you should see this information displayed in each entry, or you can download a full summary of your entries via the "Download" link in the upper right corner of the page.

If you are a White Label Customer, you will not only be able to find the number of friends that each entrant invited, but also exactly which Facebook users each entrant invited and how each of those invitees responded. This will give you valuable insight into the types of people who respond best to your promotions.