Before games get released, the certification team checks different aspects of the game (Math, functionality, text and game rules) to ensure player fairness. And by ‘certification’ we mean a large number of big, government-approved, stand-alone, international companies with the job of going through NetEnt’s products (slots) to ensure player fairness. This is something NetEnt takes very seriously.
Different authorities and governments all have different standards and ideas on how to protect their players. We make one game, one product, with a single math model, that, after rigorous testing, is released into all the different regulated markets.