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

https://charlottessuperjournals.tearosediner.net/how-do-i-read-a-slot-s-rtp-and-not-overthink-it

RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge over time. Volatility shapes how uneven wins and losses feel. In a short session, results can swing sharply either way; a run tells you little about what comes next.