I have not, but only because I volunteer at a shelter. I do the petfinder site for our shelter, and I know of at least 2 cases that people have come in specificly for cats they have seen on the site. We just adopted out 2 a couple weeks ago that had been with us 3-4 years. They came as feral kittens and just never rehabed totally They guy saw them on line & fell in love. He adopted them knowing he would have to put work into them, but those are my favoirte stories.