For those who already experience to using online casinos i think they have already know this rule that having multiple accounts in the casinos is forbidden and i think this is general rules which usually every current casinos don't allowed it so i think those who involved in online casinos for a long time have already know this rule and not necessary to read the ToS everytime when they want to register to the particular casinos because they have already know this term

But i think sometimes people having multiple account not because they want to cheat the casinos because some people has been forgot their password and email to register and usually they created new account with using new email but indeed the casinos don't want to know about this reason because having more than 1 account is against their rules