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

https://mike-wiki.win/index.php/What_Does_%E2%80%9CRisk-Adjusted_Return%E2%80%9D_Even_Mean_for_Gambling%3F

RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge over time. Volatility describes how much results can swing. In a short session, wins or losses may differ sharply from the average; RTP can’t predict what happens next.