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

https://blast-wiki.win/index.php/Why_Provider_Names_Help_but_Still_Don%E2%80%99t_Tell_You_the_Features

An operator runs the casino site, manages accounts and payments, and selects the games it lists. A slot provider makes the game. Its name shows who created it and helps you find other titles from that studio. Visuals and sound do not change the game rules