At this site players deposit their items (skins). At the end of 3 minutes long round the system chooses 1 winner, who gets
all the deposited items.

Winner is defined randomly, winchance depends on cost of deposited items.
Principle is Simple
The more is the total cost of items you bet, the greater is the chance to get jackpot. Nevertheless, even beting 1 cent (1¢) gives you an ability to win jackpot!