Ask HN: What do people do with the code from failed startups?

I see a good amount of failed startup stories come across HN and I always wonder what they do with the code after they have called it quits. I haven't really seen a case of someone open-sourcing their code and uploading on github or something. I know that this is easier said than done, there are probably some legal issues around it. Nonetheless, I am just curious in what people actually do. Do they destroy it? Archive it? Print it out and burn it?