ChessCube Cubit Expiry

Cubits deduction goes like a pyramid, from the top to the bottom, like this:

1. Free cubits (25 for first daily login, 30 for first daily rated game, 45 for first daily tournament)
2. Earned cubits (wagering games won, tournament prizes)
3. Purchased cubits (self explanatory)

The diference exists just when calculating and applying the cubits deducting ratio.