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

https://xeon-wiki.win/index.php/How_Do_I_Convert_RTP_to_House_Edge_Without_Messing_It_Up%3F

RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge. Volatility shapes how uneven results can be. In a short session, outcomes can differ sharply from the average, and your balance may fall quickly.