Hello Chris,
thank you very much for your help and work to improve the program. When booking that type of room (Privilège at Mercure) I was quite sure I would have to "work" to receive the extra points offered with this room.
At another Mercure (where I was staying in a regular room) the hotel itself promoted in the elevators to book a Privilège room and spoke of the double points as well. Therefore (plus the other benefits) I went for that kind of room this time.
But whose job is to guarantee the double points: Le Club's or the individual hotel's?