Ask HN: to give away (or not) your code after a Kaggle competition

Let's imagine you are one of the Prize winners, but that you did play the competition to benchmark your own code. If this code is under your company's license for instance, Kaggle Prizes may often be too low for you to grant the competition sponsor a full right to use and reproduce your code. My understanding is that refusing the prize does disqualify you, and that's it! Now, I wonder, how many give their code away ?