UK online casinos operate under strict rules from the UK Gambling Commission,...

https://papa-wiki.win/index.php/How_Do_You_Explain_the_Casino_Business_Model_Without_Sounding_Salesy%3F

UK online casinos operate under strict rules from the UK Gambling Commission, which set limits on payout percentages and fairness. Many games offer around a 96% return to player (RTP), meaning the house keeps a margin