Big corporations just like to buy stuff like that in case it is useful to them. Over the years they realize it isn't and let it go. Back in 2000 I owned a domain soundbooth.com which was back when napster was big. I was approached by an agent in New York who wanted to buy it off me. I ended up selling it to them for $15,000. When I transferred it to them I saw that the buyer was really Disney. If I had known that I would have asked $50,000. A few years later they just let it lapse. Just bought it in case it was useful at the time. Hey but at least I got my $15,000