The premise
People voluntarily pay to move up a public ranking. The person with the largest cumulative amount of confirmed, non-refunded spending is number one.
What the number means
It means only how much that profile has spent on Richest.fr. It is not net worth, income, assets, creditworthiness, influence, or investment performance.
Why?
For status, visibility, internet history, promotion, comedy, or a story to tell. The service is intentionally absurd. The payment is real.
The permanent rule
You're not actually richer. You just spent more.