It's not quite the same thing, because Bing was getting the data from a browser toolbar and watching the search terms used and where the user went afterwards.

It's not quite the same thing, because Bing was getting the data from a browser toolbar and watching the search terms used and where the user went afterwards. A closer equivalent would be if someone had made a ShareSERP site and people posted their favorite search terms and the results Google gave and Bing crawled that and incorporated the search terms to links connections into their search graph. The actual actions had maybe gone too far (personally I thought it was more funny than "copying"), the hypothetical would be pretty much what you'd expect to happen. Even google would probably crawl ShareSERP and inadvertently reinforce their own results (the same way OpenAI presumably gets more than a bit of their own results back at them in any new crawls of reddit, hn, etc even if they avoid sites like ShareGPT deliberately).