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

https://sofiassplendidblog.inkharbory.com/posts/what-s-the-biggest-misconception-people-have-about-rtp

RTP is a long-run average, not a session promise: at 96% RTP, the house edge is 4%. Volatility describes how uneven results can be. Short sessions can swing sharply, and past outcomes don’t predict the next spin.