Essentially, by buying all 1000 combinations, one will win $500 every game, but also lose $500 every game ( $1000-500=500). Person looses $1 per every $2 spent. Same goes for pairs: Buy all 100 Front pairs and you will win $50 every game but loose $50 also every game. The game gives you equal win as your loss. Yet to people it does not seem just. They want to win all the time. By not knowing which combinations to play to win, when people play just few tickets, their loses can be large, or they'd have occasional luck, but not constant, so losses most likely will accumulate and get larger than 50/50.