If you get the following amount of people referred to you. you get the reward next to it.
5 people = 5m Gp
15 people = 1 month free donater.
25 people = super advertiser ( 6 month donater and custom yell message )
40 people = 8 month donater and 10m Gp and custom yell message
65 people = 1 year donater and 25m Gp and custom yell message
100 people = 100m Gp + Perm Donator + Custom Yell Message + Donater Present ( Which gives claws or ags or santa or 25m )