Maybe they’re just “lucky”, that’s certainly possible.
But some popular gaming authors may say differently I think. Anything is possible right? Some people would argue that you can’t make a regular living out of ANY casino game. Personally, I think it would be very difficult to make any sort of ongoing regular living playing the slots, but I guess it’s not impossible. I’ll start off by admitting that I’ve not met many people in my life who’ve made consistent profits at slot machines, although I have met a few “lucky players”.