I do not see any good reason for them blocking multiple accounts in casino gambling by the casino platform because it has no negative effect to the platform. As long as those accounts do not go against the rules of the casino platform. They need more users and that is also part of getting new users into the system. The reason for banning multiple account in the Casino platform should be that they either violate the platform rules or cheat other users int he platform.
But come to think of it, why will a user create multiples account in a single casino in the first place? With one account, you can create open bets as many as you can. By creating multiple accounts, you are already violating the platform rules if they are among the ones that frowned against such. They actually need more users but for one person to have multiple accounts is as good as one user. It increases absolutely nothing in my opinion. The negative effect of this is that it won't allow the platform to know the exact number of users they have using their platform. The funny thing about this is that majority of us abandoned other accounts and make use of one after creating a new one thereby giving the platform fake number of total users.