Compact Shuffle Box (pre 4.6.0)

The Compact Shuffle Box was a Pro Kit Box in Asphalt 8: Airborne introduced in the 2018 Spring Update.

It is one of the few boxes that still grant blueprints and bike-specific cards after the 2019 Spring Update. If players still have it in their pending boxes list, it is advised to open them wisely, for example during a bike event.

Availability
The box was rewarded for completing a Daily Tasks streak. As of the Fast Lane Update, completing a streak now rewards instead of a box, so the Compact Shuffle Box is practically discontinued as there is no other way to obtain it.

Hidden rules
The Compact Shuffle Box always grants 2 pairs of equal rarity cards: 1 pair of a  blueprint and 1 pair of a  part, tech or engine card. Players can redraw up to three times, either the blueprint pair or the Part/tech/engine pair. This means that there is a guarantee to get 2 equal common blueprints per box.

Probabilities
As the Compact Shuffle Box always grants 2 equal cards and players can redraw up to three times, they can increase the probability of getting desired items by rejecting unwanted cards. See for a detailed example.