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

https://bravo-wiki.win/index.php/Bank_Transfer_vs_Card_Withdrawal_for_UK_Casinos_%E2%80%93_What_Changes%3F

UK online casinos operate under strict rules set by the UK Gambling Commission, including limits like a 96% minimum return to player (RTP). Despite these regulations, they find ways to remain profitable