For example, when someone wins a big multiplier and multiplies their account by 100x, then some casinos take a long time to process the withdrawal, or they may not even give the money. however, some say that if you sign up using a good affiliate or influencer affiliate code which have huge audience, then you won't face these type issues. also, if you promote the casino using your referral link, they might not hold back your withdrawal because you helped them get new customers.
As long as your account is clean and you don't cheat or violate their terms I don't think you need help coming from who referred you, a reputable casino will always process your withdrawal regardless of who you sign up with as long as you don't violate any terms of the casino, even if you have 100 referrals if you have a violation then your account is in trouble.
So if you have a lot of referrals and you're earning a residual income, be sure that you have a clean account so as not to lose your earnings, and if you will actively promote a casino be sure it's a reputable casino so you will not encounter any issues.