A casino operator runs the site and manages accounts, payments, and game...

https://www.runway-bookmarks.win/an-operator-runs-the-casino-site-sets-its-game-list-and-handles-your-account

A casino operator runs the site and manages accounts, payments, and game access. A slot provider makes the games. Provider names matter in a catalogue because they show who built a title and help you find other games from that studio