No famous lingerie brand would take her, because it's common use and long-time tradition at those companies to take famous mainstream fashion/editorial models or celebrities to advertise their products. They take top models with some boobs, like Heidi Klum, Gisele Bundchen, Tyra Banks etc. When
Denise Milani showed up on the internet, she was a girl next door, had no name and recognition and no one at those companies knew her. Then, by appearing on websites and with looks like that, she was automatically categorized as a men/erotic/porn model. They're stupid and close-minded there in the "serious" industry.