How slots pay out
A slot with 96% RTP doesn't give you back $96 of every $100 tonight. It means that across millions of spins by everyone, about 96% of the money played is paid back as wins. The other 4% is the casino's share.
In one session anything can happen. That's volatility. A high-volatility slot can go a long time without a win, then pay a lot at once.
Try it: spin 1,000 times
A pretend slot with 96% RTP. No money involved. Watch how the payback lands near 96% only after many spins.