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

https://messiahssuperop-eds.image-perth.org/why-do-some-sessions-end-up-way-above-rtp-and-others-way-below

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.