#1 - The first rule of CUD is, you do not talk about CUD.

#2 - The second rule of CUD is, you DO NOT talk about CUD.

#3 - If someone says stop, backs out, retracts a sale, the upgrade is over.

#4 - Two upgrades at a time.

#5 - One benchmark at a time.

#6 - No food, no drink

#7 - CUD will go on as long as it has to.

#8 - If this is your first day of CUD, you have to upgrade.

Credit to: Quantum714 for the CUD club rules

CUD = Compulsive Upgrade Disorder