I don't think she got cancelled for the size of her breasts. If you look at Joan after the show
stylebistro
Her breasts do not look that much smaller than Jourdan's. I think she did get cancelled because of her breasts, but because of the fact that they look like obvious implants, not because of the size. In real life I think Jourdan's body looks amazing with her implants, but the distance between her breasts is quite noticable and in a show with so many transparent dresses they probably just didn't fit the look.

stylebistro
Her breasts do not look that much smaller than Jourdan's. I think she did get cancelled because of her breasts, but because of the fact that they look like obvious implants, not because of the size. In real life I think Jourdan's body looks amazing with her implants, but the distance between her breasts is quite noticable and in a show with so many transparent dresses they probably just didn't fit the look.