Maybe the one who win and flex their winnings is just trying to win by betting in short time using this strategy. They just come and exit once they hit a good win then leave, this is somehow a good strategy since you didn't wait for the bad luck to came then been defeated by house due to our own greediness for using this strategy.
The same with other strat if you come up and bet excessively you will not gain anything whatever strategy you use so better they should think about that any strategy will not work for long term.
It is possible indeed, if you use this strategy and manage to quit right after winning, there's a positive outcome and only few can do that, most of the time, those who win their bets after several clicks will think that luck is with them, they will keep pushing for more and trying to increase the amount of their winnings, not to realize that after some good winning streak, excessive losing streak will come out and suck all those earnings and includes their initial capital.
That's how things mostly happen. Whatever strategy, if you failed to follow your limitations, it ends up losing your money.