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

https://dominicksbestdigests.huicopper.com/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 wins and losses arrive—steadily or in bigger swings. In a short session, results can vary sharply either way.