from some days before i read about the problem google show with another search engine Bing who come from Microsoft. well google show that bing copycat and Microsoft show that they not. i am not known matter much more but predict something that maybe true if google are right in what they tell.

if MS really copy the search from User then they use Live service who used by all user who use the internet or on the internet. see the snapshot i have

in this snapshot they tell that

Help improved search results,internet safety and Microsoft software by allowing Microsoft to collect and retain information
about your system, the searches you do and the websites you visit. Microsoft will not use this information to personally
identify or contact you. Learn more

so why they need the research on what user search on internet even the not contact but user their is no reason as well as bing. well their is a example who maybe possible they  use for bing.