Referral Codes

I would like to allow subscription members to act as affiliates and refer us additional members (their friends and family and such) and for their efforts receive free or discounted membership after they refer us a minimum of x# of other members.

Just as a single tier, nothing crazy…

First member refers second member, First member gets %off membership.

Second member refers third member, Second member gets % off membership - First member gets nothing for this referral.

after x# of memberships referring member receives free membership. System confirms and tracks that all referred members are currently paid members.

I would like the % off adjustable based on the # of referrals. ex:

1 referral gets ___

2 referrals gets ___

etc

10 referrals gets ___

and as a nice perk, it would be great if the members could themselves track which of their referrals have become and are maintaining active member status.