I remember the concern years ago was: since the application was bought (acquired?) and the tool was still publically free, that the new owners had added the spyware to try and monetize the data coming from said spyware/telemetry.
After reading your comment I went back and did some cursory searches, and it looks like the general concensus is that its less of a concern than it was originally - although, there is still uncertainty around how the tool is being monetized, which is enough for some to stop using it.
Yep. Its just another form of tribalism.
In a similar vein as Meyers-Briggs, Harry Potter houses, and every single buzzfeed quiz.
People are dynamic. We are the product of our experiences, not the position of the planets.