So that those who had a balance in the old version can withdraw them to the new one after creating their accounts on the new platform. The old platform doesn't allow you to gamble; if you notice, the deposit page is closed, and only the withdraw option is available. If you go to the Casino section, you will see no games available, and you will find a note directing you to the new platform. Check below:



I'm sure the team will close the old platform after some time, but for now, it should stay only to make sure that every user has successfully migrated from the old platform to the new one and there shouldn't be complains coming from gamblers for not giving them enough time or allowing them to withdraw their funds before closing the platform.