Each registered user on the site gets to click on that button at most 5 times per game. The button has a built-in counter that increments each time it has been pressed. The person who clicks on the button on exactly the 420th time, wins. The 1st contest starts every day at 11:20am PST, and the 2nd contest starts every day at 4:20pm PST. Players are allowed to win 1 prize (per household or address) per every 14 days.
