[mooreds]

If you have a product people have paid money for, and say you're releasing it as open source because it isn't sustainable, the people looking for that code aren't typically interested "training data".

I get your point that messy code may be useful for other purposes, but believe that the vast majority of users are looking for code to solve their problems, not "training data" or research.

That said, as you say, rights holders can do what they will.

[mcbits]

Yep, I'm just saying that if someone can and wants to release their code, they shouldn't let "is this even useful to anyone?" stop them. It could turn out to be useful in ways that nobody has foreseen.