Referral mostly have their own rewards such as the affiliates which the referrer get a reward, token, spins and etc. if they reach a specific number of referral and of course if you know a person who really loves gambling its a good thing for the gambling casino itself at the same time with you because some of the affiliates get a small portion or percentage to the total number of deposits came from the person who make a play to the particular platform.
I think not really interested with referral reward commission trough spin bonus or token, I think why not reward commission given with coins or depending what kind coin deposit by our referral. Still not active become upline and I don't know with how much percentage reward giving each referral getting, have count depending with how much fund betting by our referral or depending when get new member and success make deposit will get commission reward based on amount deposit by our referral.