Earlier quoted context omitted.
the effect is the same as intentional scraping and outright stealing The google engineers intentionally sent this click data to Bing, so is Bing really stealing? It's odd to act surprised when Bing uses the data that was intentionally sent to it. Bing could specifically ignore Google search results pages when it is tracking clicks, but is that legitimate? Google scrapes everything, why shouldn't Bing?
They were testing to see if it was true. Many users are doing it, bing is taking data for non-google engineers too.
In fact, the data that it takes from Google engineers for carefully engineered corner-case searches is the exception.