She was signed to IMG, I believe.
And I don't think Shannon had a problem undressing backstage. She must have had to on the show, and she never said that was a problem. Nude for a public photo was crossing the line for her, but I think she could have done well without getting to that point.
She also mentioned being turned down for some designers, turning some of them down (too risque clothes), and was turned down for even some commercial gigs (toothpaste commercials and the like). Unfortunate, I think.