I used to use it until I turned off WU in advance of the Windows 7 October "patchocalypse." I don't plan to use it further, preferring a different second-opinion tool. Woody Leonhard has more on the MSRT telemetry: https://www.askwoody.com/2016/telemetry-from-the-malicious-software-removal-tool/
I remember when I posted this in February on the Borked Updates Thread: https://www.wilderssecurity.com/threads/bork-tuesday-any-problems-yet.370217/page-68#post-2564110 Maybe Microsoft is reading the Forums.