Can anyone recommend a software?

I need software that will allow me to:
Accept free members or paid members; so, there would need to be 2 affiliate groups (free and paid).
Free members get 25% commission.
Paid members get 50% commission.

Additionally, all affiliate commissions need to be "residual", ie: lifetime commissions.
example:
Let's say my service costs $10 per month. Someone (Billy) can join as a member for free, start promoting and make 25% commission. If Billy has referred 10 paying members, he will get $25…
Can anyone recommend a software?

See original post by MrLeN