UK online casinos operate under strict UK Gambling Commission rules that limit...

https://blogfreely.net/teresa-long85/what-are-the-main-revenue-streams-for-a-uk-online-casino-besides-the-house-edge

UK online casinos operate under strict UK Gambling Commission rules that limit how they manage player money and payout limits. Despite these controls, they still make a profit by carefully balancing game design and player incentives