I have a membership site which I'm trying to get started and I need some advice. The site is... MidasEffect.com New visitors are offered a free Silver membership with 6 free ebooks. During the signup process they are offered an upgrade to Gold membership with 100 ebooks with resell rights. Both Silver and Gold members can make referrals. Silver members who make 50 referrals get upgraded to Gold membership for free. If a referral upgrades to Gold membership the referrer gets $25 commission. Although I am getting people signup for the free Silver membership, I'm not getting many referrals or upgrades. Any ideas on how I can boost referrals and upgrades?