Teams sometimes reward GitHub contributors with their airdrop. Makes sense, devs should be rewarded. 

As a result there is now a airdrop farmer type who uses ChatGPT to find typos and submits PRs against it. They often get merged because it’s free to merge and no one wants typos but maintainers complain that they are spammy and not worth the context shift and attention it takes to review the PR. They are sometimes appreciated but often considered low value PRs.

How I see it:

Someone did some work. Maybe it's an AI bot (i.e. their creator did some work to put it together, even pay for hosting, etc.) or a person. Typos are not nice, and if you have them, you want them corrected, so having incentives for it is not abad idea.  If there is an airdrop, they should be rewarded.

Alternatively, someone could spend their time building this AI bot that corrects typos, and offer it to the project, i.e. they should be rewarded.

That said, PRs that are simple typo corrections (string updates), obv have less value than code additions or fixes, and they should be rewarded accordingly.

Typos are low hanging fruits. I'm sure there will be bots that create optimization PRs. Or language translation PRs. I would say that's welcome too.

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Maybe a very short term thing once repo maintainers have even better tools to just check the copy themselves.