The affiliate webpage says they pay 20% for up to $10,000 a month in MGR and 25% for over 10k a month. They also have a sub-affiliate system where if you refer a new affiliate then they give you 20% of what they make, so the total would be 30%. There may be some private bonuses above and beyond that, but from what I've seen the bonuses are normally only given if you refer more players in one month than in the previous month. And those bonuses are normally a flat rate per player, like a $2000 bonus if you refer an extra 45 players.