ok genuine crisis of faith here. I've got two games I've been working on, both are intended to be fully open source. One is nearly ready for a public release, the other is probably realistically a year or two out. I feel it is important for the source to be available for the former, and it might not yet be part of any training sets because it only has 17 stars on github, but I'm assuming it probably is already.

The latter is largely not online at all, because I simply haven't built it yet...

I was ambivalent about my code going into training sets, but now for a variety of exciting reasons I am no longer ambivalent. So here's the conflict: the only way I can think of to realistically prevent it from ever going into the plagiarism machine is to simply never make the source available. There we go. That's the crisis of faith.
This is all possible because we had a healthy commons and so that's the reward for building a healthy commons: enclosure by billionaires who are promising the end of everyone's ability to make a living in a creative field. If that really will come to pass, we'd have been better off if we never shared anything on the internet and that really hurts.
@aeva I really need to bookmark interesting posts more often. There was a post with a solution that sounds like a good place to start. Paraphrasing: "If you want access to the source, talk to me. Make the human connection."