A casino lobby may look like one screen, but it relies on separate provider...

https://wiki-cable.win/index.php/Why_Do_Casinos_Say_a_Deposit_Success_Doesn%E2%80%99t_Guarantee_Withdrawal_Speed%3F

A casino lobby may look like one screen, but it relies on separate provider integrations, balance records and payment updates. Those systems need to stay in sync so a game launch, wager and account balance make sense together.