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

https://www.emergbook.win/rtp-is-a-game-s-long-run-average-payout-not-a-promise-for-your-session-96

RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge over time. Volatility affects how uneven results can be. In a short session, swings can leave you well ahead of or behind that average.