The flood of low effort AI-contributions makes accepting anonymous contributions impractical nowadays. They'd waste hours reviewing things of no value. I know because it happened to several of my moderately successful projects. At some point I had to stop caring. I now only review the PR if the message is a single unformatted paragraph with few emojis, I find this to be a good signal that it was made by a human and not an agent (the code could still be LLM but a human cared enough to write their own message). I'm sure I will miss genuinely good and valuable contributions, but the signal-to-noise ratio is just too low.
It would be 100x worse for them because who wouldn't want to have a browser in their contribution portfolio when seeking a job?
A lot of folks might not want to hear it, but realistically some there's going to have to be a cultural realization that machine-generated low effort slop is not any more desired or helpful than human-generated low effort slop.
That's not an outright rejection of LLM-assisted code, it just means that a real person needs to be awake, at the wheel, and just as significant of a contributor. Literally anybody can point Claude at a repo and say "add X feature" or "fix Y bug" and so PRs that do that carry no value.