Could you check the "Forget Password Page", I got a blank "New Tab" went wanna try to using a "Forget Pasword". I dont know its only me or other people got blank too
I encounteted the same problem (
blank page) when I tried to reset my account's password. I just checked it and it seems like they fixed the problem:

So I can create an account and get referral link. Then I can register with my referral link. There is no limit for that.
The casino has nothing to lose since the referrer will get nothing unless the referee deposits some money. Besides, it is cheating and you may lose your account.