RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge...

https://smart-wiki.win/index.php/How_Do_I_Treat_Expected_Loss_Like_the_Ticket_Price_for_Entertainment%3F

RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge over time. Volatility describes how bumpy results can be. In a short session, you may win or lose far more than the average suggests, so set a limit you can afford.