A casino operator runs the site and manages player accounts. A slot provider...

https://ace-wiki.win/index.php/Why_Do_Some_Slot_Games_Have_Flashy_Effects_but_Weak_Explanations%3F

A casino operator runs the site and manages player accounts. A slot provider creates the games. Provider names show who made each title and help you compare catalogs. Visuals and sound may differ, but they do not change the game rules.