The lobby may look like one screen, but it connects game-provider integrations,...

https://coinsniper.net/blog/behind-the-casino-lobby-the-technology-that-makes-online-play-run-smoothly

The lobby may look like one screen, but it connects game-provider integrations, balance records and payment status updates behind the scenes. These systems need to stay in sync so players see the right balance and know whether a deposit has completed.