The S3 porn girl, Shelly or something, the one who wore the plushy octopus on her head all the time, explained this all to us. It's all in the contract. She said she had learned her lesson from doing porn and made sure that no company could use her image for more than 6 months after a production wrapped. Ubless there's a time limit specified in the contract, they could use her images in perpetuity for advertising purposes and even in other projects that she hadn't agreed to.
Right after that she was eliminated lol