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

https://sofiascoolcolumn.rivetgarden.com/posts/what-does-risk-adjusted-return-even-mean-for-gambling

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.