But according to the study, the house edge of a slot machine is around 5% to 10%, therefore there's no way you can win in the long run. This type of game is only good if you are lucky, or just trying to have fun, and that house edge will certainly make your forecast wrong most of the time.
The house edge for slot machines typically falls between 5% and 10%, with most machines delivering a payback percentage in the 90% to 97% range. (If it's 90%, the casino's take—and the player's loss—is 10% of the coin in, for example.) But how can casino operators determine the best house advantage for their bottom line within that range? "It's really a pricing issue, because it's a unique product," said Lucas. "With real slots, the price isn't marked anywhere."
Source : https://arstechnica.com/science/2019/10/study-busts-popular-myth-that-gamblers-can-sense-differences-in-house-edge/
They say it's based on skills but actually only gamblers who know how to cheat won the slots. Slots are programmed by computers, the house edge is high, therefore it's hard to convince me that it's won by skills. If Slots is based on skills then probably is also based on skills, a dice game has a 1% house edge and yet we are still losing in the long run.
I don't think slots require skills to win because there's just a small chance of winning here and there's no specific and effective strategy that we could apply to it. It's a pure luck game for me since the result isn't really predictable and there's no consistent sequence.