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

https://www.bookmarkingvictor.win/rtp-is-a-long-run-average-not-a-session-forecast-96-rtp-means-a-4-house

RTP is a long-run average, not a session promise: at 96% RTP, the house edge is 4%, or about £4 per £100 wagered over time. Volatility shapes how wins and losses arrive. In a short session, results can swing sharply either way.