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

https://www.beacon-bookmarks.win/rtp-is-the-game-s-long-run-average-return-the-house-edge-is-the-casino-s

RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge over time. Volatility describes how uneven wins and losses can be. In a short session, results can differ sharply from the average, and you can lose your stake.