The best explanation I can come up with is that a failure to notify them of a change makes them look bad when their search results are out of date. Especially if the failures are malicious, fitting in with the general theme of the article.
[1]: https://www.indexnow.org/
[2]: https://www.bing.com/indexnow
[3]: https://blogs.bing.com/webmaster/october-2021/IndexNow-Insta...
Should be easy to crosscheck the reliability of update notifications by doing a little bit of polling too.
"most of everything is shit" comes to mind, but "most of email being spam" and "most of web-traffic being porn" are well known.
Actually everything we discussed here is the result of genuine human activities.
I wonder if there's some sort of "time" threshold for how long an AI can speak/write before it is identifiable as an AI to a human. Some sort of Moore's law, but for AI recognizability