They're many ways by which you can get notified if at all they're any upgrades or bonuses for players, normally online casinos sends mails to all their players to inform them if there's any general changes to any games or any bonus available.
Another way is for you to check the casino website periodically to avoid missing any updates or any raffles initiated by the casino website, if any of this doesn't work, you can contact the casino website and give them your email address to mail you for any changes.
Another way is for you to check the casino website periodically to avoid missing any updates or any raffles initiated by the casino website, if any of this doesn't work, you can contact the casino website and give them your email address to mail you for any changes.