The lobby may look like one tidy menu, but games can rely on different provider...

https://brookssimpressiveop-ed.wordcanopy.com/posts/why-do-casinos-list-game-providers-and-studios-in-the-lobby

The lobby may look like one tidy menu, but games can rely on different provider integrations, while balance records and payment updates are handled elsewhere. Keeping those systems in sync is what makes a simple click feel straightforward.