I think that if you will send your referral link to everyone - you can`t reach some nice profit if you haven`t some resource(website with reviews for example) with lots of new visitors. I don`t think that the big gamblers often register with such links. But if you have friends, that wants to gamble but don`t know how to start - it is possible way to get several $ for advices.
There are various techniques if we want to get your referrals to increase, one of which is that we can spread it on the internet while promoting the casino in free articles or gambling forums. but to do it, it really takes up our time. except, if we are reliable in the field of the internet.
However, what you said I totally agree with regards to big gamblers. usually, big gamblers will not carelessly play at any online casino. at least, he already has some references from his relatives or directly from forums like our community. then we can register it, according to the referral link that we provide.
So, don't ever expect a lot to get profits just from referrals especially if we don't have a special technique. except, if we have media resources to distribute referral links to be shared with new users, plus, promote the online casino. that way, someone can make a profit from their referrals.