Well said, but saw it too late 😭

Recently, Binance launched a new product called 'event contract', and the dynamic numbers and exciting slogans on the promotional page make people eager to try. But when I dissected the rules using my knowledge from university probability courses, I found that this might be the most ingenious 'vegetable harvesting machine' in recent years—it doesn't even need to operate in the shadows; just by mathematical formulas, it can ensure that players inevitably lose their capital.

One, the devil in the details of rule design
This game appears extremely simple on the surface: you bet 10U, guess the result correctly to earn 8U, guess incorrectly to lose 10U. But it is this 'earn little, lose much' setup that mathematically constitutes a perfect death spiral.