the gambling site owner's earn money by the commission which it takes 1% or less on every bet made by user , when blowing accounts where all money goes, in casino's pocket or where ,
As far as I know, if you have registered on an online gambling site and made a deposit and made a gambling bet there, you are already classified and included in the quote below.
Any money in your account would be classed as part of the company. You would lose any money in your account.
Means: the gambling company has access to your account, as well as the balance you have, yes they will take your funds, if this happens it a 'Blocking' from the online casino.
Different from other cases, for example: the customer/user chooses not to visit the casino again, in other words, the user deletes or deactivates his own account, in such cases the balance remains/frozen, the casino does not take it, if at any time the user accesses the account the balance is still there.
Conclusion: your question regarding the funds in the user's account, depending on the case faced by the user himself, Blocking & deactivating different options.