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

https://marcoscooljournals.lowescouponn.com/how-do-i-set-a-session-limit-using-expected-loss-math

RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge over time. Volatility describes how uneven results can be. In a short session, wins or losses can differ sharply from the average, so don’t treat it as a forecast.