They always think they're smart creating multiple accounts to take advantage of deposit bonuses to ruin every good chances of a legitimate accounts winning any bonuses and wherever they get caught, come to the forum to complain with faceless accounts cause they would sound stupid complaining from their main accounts.
Many cases did found not just with 1win but also in other casinos that people claimed they have never made multiple accounts which is against the casino rules. The bonuses that they think are easy money, investigations are done with this and it's a process that they have to verify to make sure if the accused has abused the system or not. So, if there is the verdict that it has been abused and taken advantage of, they will surely say that it's done and deposits are likely to be refunded to the user but won't be allowed to play anymore.