I'm not sure. I didn't think about this seriously in an adversarial context.

What I can imagine though is that

- the value of merged PRs might drop (as it's not a good metric anymore)

- while the cost of submitting them goes up (as price per token is radically changing, e.g. Github announcement just this week)

so maybe it's also only temporary.

Also if all this is correct, including the value of PR on popular repository being more important, then the long tail of projects might not have to worry about this.