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

https://echo-wiki.win/index.php/Does_96%25_RTP_Mean_I_Get_96p_Back_for_Every_%C2%A31_Tonight%3F

RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge over time. Volatility shapes how wins and losses arrive. In a short session, results can differ sharply from the average; past outcomes don’t predict the next one.