yaaa you must have proof that you are a good predictor, because ur suggestion can change someone decision.XD
but i agree that mmr is doesnt related much againts predictor,you must be very good at predict.know knowledge about whats goin on in esports today its important too.
i had esports betting site for csgo:
http://gamgaming.blogspot.co.id/2015/10/best-csgo-bet-bitcoin-site.html
but remember bet at your own risk