It's not the art objects, it the business practice to sell the art that matters. Branding matters. An artist need to put 10,000 hours in on the business side of art life, David Hockney is a brand, Warhol, Picasso, Anish Kapoor, Robert Rauschenberg , Jasper Johns, Jenny Saville all brands. It's marketing and branding that sells art. An artist can never be too rich or famous.