[bzbarsky]

> You choose to give your data to Microsoft/Google/Facebook

If only that were so.

Facebook gathers data on you whether you give it to them or not. See https://www.dailydot.com/news/facebook-shadow-profiles-priva... for example, but this is generally well-known.

As far as I know Google likewise gathers all sorts of information without asking for it, just from their ads and analytics running on various websites.

Microsoft is a slightly different story.