RTP describes long-run returns: 96% RTP means a 4% house edge, not a promise...

https://wiki-net.win/index.php/How_Do_I_Explain_Variance_to_Someone_Who_Hates_Statistics%3F

RTP describes long-run returns: 96% RTP means a 4% house edge, not a promise for your session. Volatility affects how wins and losses arrive. Over a short session, results can vary sharply, and your balance may fall quickly.