Companies have systems that track user activity through their dashboards. It's mean, companies can easily see how long you've played on the platform, what games you've played, and how much you've deposited. all of these can be recorded. So, they don't need to track individual users, to know their users addicted or not. the system helps keep track of everything. The loyalty programs run by gambling companies are proof that they have systems in place to monitor your activity on their services. if your gamble frequently and for long periods of time, and frequently deposit on the same day (more than once), it could indicate you've been identified as an addicted customer. Tracking user activity is that simple.