I mean, I do open PRs for most of my changes upstream if they allow AI, once I've been using the feature for a few weeks and have fixed the bugs and gone over the code a few times to make sure it's good quality. Also, I'm going to be using the damn thing, I don't want it to be constantly broken either, and I don't want the code to get hacky and thus incompatible with upstream or cause the LLMs to drift, so I usually spend a good amount of time making sure the code is high quality — integrates with the existing architecture and model of the world in the code, follows best practices, covers edge cases, has tests, is easy to read so that I can review it easily.

But if a project bans AI then yeah, they'll be run out of town because I won't bother trying to contribute.