Many youtubers and friends share their referral codes/affiliate links, saying you will get bonuses, real money, or free spins. but I wonder if casinos give extra help or benefits in some different situations.
Nope, the only benefits you may get is only the one offered by the one who asked you to get registered under their referral link.
Some streamers may offer you something like free balance on sign up and or other regular bonus if you are actively playing.
When it comes to general services by the casino such as deposit/withdrawal, support, etc, you will be treated the same as others.
Dont hope to much when you are registering an account under other's referral link, at the end all players are the same no matter where they registered.