I do not see this as profitable, getting referrals is something that is not my thing, I prefer to work doing other things, whenever they are referred they are conditions that are required a lot and it is not something simple, generally they are things that are required of the referrals make investments and not all referrals are willing to do so, if the casinos make this option they will not have very good results. I have only seen in other cases things like referrals in binance.
Referrals can be profitable if you happen to get lots of it. If you got lucky and happen to refer a whale player, then you will be reaping huge commission from the wagered amount of the player. But other casinos are outsmarting the referral system by paying only if the casino wins and charging the person who refers the player when the player wins. I think there is that kind of referral reward here I just can't remember what Casino is implementing such system.
You know it's not very easy to always get referrals except you have a site or social media platform where you do get followers that can easily use you referral link and join which will give you good earnings. This can not be done always and we can not depends on it because the reward ratio may not be long compare to what we can make referring people through links. Streamers can do that better than just am ordinary person that does not have big group.