This reminds me of a sad/funny bit at the end of my tenure with TimeGate. Management proposed a competition where anyone could pitch game ideas, the CEO, President, and Design VP would review, and some number (five?) would then be concepted out, with one eventually being developed. Any that were rejected would get detailed feedback to help folks understand how game pitches should work, design approaches, etc., etc. The caveat being that the company got ownership of all the pitches, which is a pretty standard thing to prevent the submarine infringement claim that often comes when pitches are declined (i.e., ten years later studio independently comes up with similar idea, it's a big hit, original pitcher sues for infringement; happens with movies all the time).
Being young and naive, I pitched like three different ideas (each a ~10 single-spaced design doc). But TimeGate then didn't even review any of the pitches as best I can tell, never gave any feedback to me (or anyone else, I don't think?). As far as I know, those pitches all just got thrown away -- the idea was meant as a morale boost, not an idea theft, but the workload wound up too great to justify it or something. But from a legal standpoint, I've always figured I couldn't pursue those ideas any longer. It's really too bad, as they'd been things I'd been interested in for years, my favorite being a space-colony-gone-wrong King of Dragon Pass idea called Project Canaan (I think?). Now some random creditor owns the ideas, I guess.