A demonstration can produce the same sort of animations and outcomes as a paid pokie while creating a very different subjective experience. The missing ingredient is financial consequence: simulated credits do not represent money a person can withdraw or lose. This affects attention, memory and emotional response. It does not, by itself, show that the random-number generator was changed.
The role of real stakes
When every action may reduce a cash balance, even a small outcome can carry emotional weight. Virtual credits are easier to treat as abstract counters, so people may play more quickly, take less notice of ordinary losses or continue after a run that would have felt uncomfortable with actual funds. That change in behaviour can make the demo seem more generous or more entertaining without any measured difference in return.
What people remember
Large animated wins and bonus sequences are salient. Quiet, uneventful spins are not. A reader may therefore recall 'winning frequently' during a trial when the balance actually declined. Without a complete record of stake turnover and total return, those recollections are unreliable. The same selection effect occurs in clips that highlight bonuses while excluding the many spins that preceded them.
Visual design influences interpretation
Celebratory sounds can accompany payouts that are smaller than the amount staked. Such outcomes may feel like wins even when the net result is negative. In a demo there is no external financial statement to challenge the impression. Counters, animations, autoplay speed and temporary promotional overlays all influence what is noticed.
A separate technical question
Whether the demo and paid builds share identical probabilities is a different question requiring edition-specific information. Their appearance does not prove the answer either way. The page about demo RTP comparisons explains how that question could be investigated; the limitations page explains why a short sample is not adequate evidence.
The central conclusion is perceptual: a game can feel easier or harder when the stakes are imaginary. That feeling is not a basis for predicting, recommending or judging paid gambling outcomes.