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

https://page-wiki.win/index.php/Why_Do_Slot_Games_Look_So_Different_in_the_Same_Casino_Lobby%3F

A casino operator runs the site, manages accounts and payments, and selects games for its catalogue. A slot provider makes the game. Provider names help you find games from a particular studio and compare their features