Knowledge Base
Articles to understand the mathematics behind bonuses, plus our methodology and transparency.
Articles
📖 4 minStart here
What is expected value and why does it matter?
After this article you'll know exactly what +€51.43 at LeoVegas means — and why that number matters.
📖 3 min
Wagering requirements explained in plain language
How wagering requirements really work, why game weighting matters and when the terms become too heavy.
📖 3 min
Free spins: what are they really worth?
How free spins are valued and why nominal bet and RTP matter.
📖 5 min
Why most casino bonuses cost money
Most bonuses have a negative EV. We show you how to find the exceptions.
Transparency
Our methodology: how we calculate EV
Transparency about assumptions, formulas and sources. The calculation is based on theoretical RTP and uniform bet sizing.
About BonusWijs
Who is behind the site, why it exists and how it is funded.