Every single online casino uses the promise of massive "free" bonuses to entice new players to register.

It is easy to see a $1,000 welcome bonus and assume you can simply deposit, claim the cash, and walk away a winner.

The reality is that every single bonus is protected by a complex set of mathematical rules known as "Wagering Requirements."

Failing to read the fine print is the number one reason players have their withdrawal requests denied and their winnings confiscated.

Our guide will explain the mathematics behind playthrough multipliers and how to spot predatory bonus terms.

The Mathematics of the Bonus Catch

Simply put, it is a mathematical hurdle you must clear before the casino will allow you to withdraw your funds.