A bouilleur de Cru is a person who’s profession it is to distil, bottle and sell cognacs made solely of his own harvest. So the answer is false. The bouilleurs de cru are small winegrowers that make their own brand, usually a brand that is not well-known in the world. Besides selling their own products, they also usually sell a substantial part of their wines or eaux-de-vie to the big cognac firms.
A bouilleur de profession distils wines for other producers who do not own their own pot still.