Note that the ACTUAL organizer of the treasure hunt is not Michel Becker, but Régis Hauser (aka Max Valentin) who died more than 10 years ago.

Michel Becker only helped illustrate the book that is the support for the hunt and has taken over it when he passed.

As far as I know this was quite controversial because he had not knowledge about the riddles or how to solve them, and was only able to take over because there was a notarized enveloped left behind by the original creator which explained everything.