That’s a really good question, and most people don’t even think about it. There’s a clear explanation of how it works here:
https://paiementscasino.com/principes-editoriaux/. Basically, the editorial principles outline how the site reviews casinos objectively — things like transparency, accuracy, and how they separate ads from real analysis. It’s what gives a review site credibility. That page goes into detail about the process they follow before publishing — they actually test payments, bonuses, and user experience before recommending anything. I like reading from sources that clearly list their review standards, because at least you know they aren’t just copying marketing material.