Yuwie
Heres some usefull info and extras for yuwie
yuwie referral tree if you refer 3 they refer 3 and so on to 10 levels deep
LEVELS - REFERRALS
1---------------3
2---------------9
3---------------27
4---------------81
5---------------243
6---------------729
7--------------2,187
8--------------6,561
9-------------19,683
10------------59,049
TOTAL------88,572
this can make you a nice wage after a while plus just think who you can advertise to.