So how does the referral system work? From where is the % taken? Is it added to the houses rake or payd by the house ?
If house takes 2% would that mean that the user would gain 1% of that 2%?
So lets say someone looses 100 and the rake is 2. The amount the user would get for the referral is then 0.02?

You also mention that investors gain extra depending on level. Lets say a level 2 rare with extra 8% would then gain 0.16 in that situation ? Or is it +8% of that 0.02?