Hey Kole I can understand you worries there is an official Raffle Rules thread:
This will probably clear your questions. Don't worry I'm sure the PokeMMO team try to stop any Bias/Rigged Raffles from happening hope this helps!
I need to thank bali so much he did 6 Level 100 pokes in two days idk how he managed but he did deserves all the praise he gets for such a fantastic service