It kind of astounds me how many previous sponsors are anonymous. (Well, sponsored features, I should say. I guess it could be the same one anonymous sponsor.) I'd be interested to know, just in general terms, what kind of real-world situation(s) there are where the downside to being public about this is greater than the goodwill/respect they would get for doing it. Maybe they do not want to be known as a company willing to sponsor development that they don't "own"? Could there be legal ramifications?